BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access t... more BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.
RENNELL ISLAND LIES 168 km south of the main chain of the Solomon Islands (Figure 1). The avifaun... more RENNELL ISLAND LIES 168 km south of the main chain of the Solomon Islands (Figure 1). The avifauna of this large (676 km 2) uplifted coralline limestone island is indisputably distinct. Of 37 breeding land and freshwater bird species, five species and nine subspecies are endemic, and six additional subspecies are endemic to Rennell and nearby Bellona (a smaller raised limestone island 24 km northwest of Rennell). Ren
Classification and Nomenclature-North and Middle America. The Committee has continued to operate ... more Classification and Nomenclature-North and Middle America. The Committee has continued to operate in the manner outlined in the 42nd Supplement (Banks et al. 2000). During the past year, Douglas F. Stotz left the committee. Changes in this supplement include the following: (1) 3 species (Psittacara erythrogenys, Monticola saxatilis, and Sporophila bouvronides) are added to the main list on the basis of new distributional information, including one transferred from the Appendix; (2) 7 species (Antrostomus ekmani, Accipiter atricapillus, Corvus minutus, Delichon lagopodum, Chlorophonia sclateri, Chlorophonia flavifrons, and Melopyrrha taylori) are added to the main list because of splits from species already on the list; (3) 1 species name is changed (to Lepidothrix velutina) because of a split from an extralimital species; (4) the distributional statements of 3 species (Sclerurus mexicanus, Chlorothraupis carmioli, and Amaurospiza concolor) are changed because of splits from extralimital species; (5) 1 species (Empidonax occidentalis) is lost by merger with a species already on the list; (6) 1 species (Myiodynastes chrysocephalus) is removed due to transfer of a subspecies, rendering the species extralimital; (7) 1 genus (Microspizias) is added due to a split from another genus, resulting in a change to 1 scientific name (Microspizias superciliosus); (8) 3 genera (Mustelirallus, Rufirallus, and Periporphyrus) are added by merger with other genera, resulting in the loss of 4 genera (Neocrex, Cyanolimnas, Micropygia, and Rhodothraupis) and changes to 5 scientific names (Mustelirallus colombianus, M. erythrops, M. cerverai, Rufirallus schomburgkii, and Periporphyrus celaeno); (9) 1 genus (Myrmothera) is added due to a transfer of a species between genera, resulting in 1 change to a scientific name (Myrmothera dives); (10) a subfamily name is changed (to Florisuginae) because of nomenclatural priority; and (11) 2 species (Falco rufigularis and Amazona finschi) are added to the list of species known to occur in the United States. New linear sequences are adopted for species in a portion of the Rallidae, for species in the genus Psittacara, for genera and species in the Grallariidae, and for species in a portion of the Cardinalidae, all due to new phylogenetic data. Literature that provides the basis for the Committee's decisions is cited at the end of this supplement, and citations not already in the Literature Cited of the 7th edition (with supplements
This is the 21 st supplement since publication of the 7 th edition of the Checklist of North Amer... more This is the 21 st supplement since publication of the 7 th edition of the Checklist of North American Birds (American Ornithologists' Union [AOU] 1998). It summarizes decisions made between 15 April 2020 and 15 April 2021 by the American Ornithological Society's (formerly American Ornithologists' Union) Committee on Classification and Nomenclature-North and Middle America. The Committee has continued to operate in the manner outlined in the 42nd Supplement (Banks et al. 2000). During the past year, Blanca E. Hernández-Baños was added to the committee. Changes in this supplement include the following: (1) 4 species (Columba palumbus, Amazilis amazilia, Ichthyaetus ichthyaetus, and Helopsaltes certhiola) are added to the main list on the basis of new distributional information; (2) 6 species (Larus brachyrhynchus, Strix sartorii, Sitta insularis, Euphonia godmani, Basileuterus delattrii, and Melopyrrha grandis) are added to the main list because of splits from species already on the list; (3) 1 species (Cistothorus stellaris) is added to the main list because of a split from a species already on the list, and the English name of that species (C. platensis) is transferred to C. stellaris; (4) 1 species name is changed (to Polioptila bilineata) because of a split from an extralimital species; (5) 1 species name is changed (to Caracara plancus) because of a lump with an extralimital species, but with no change to the English name; (6) the English name and distributional statement of 1 species (Catharus dryas) are changed because of a split from an extralimital species; (7) the distributional statements of 5 species (Hydrobates castro, Thamnistes anabatinus, Ramphocaenus melanurus, Anthus lutescens, and Turdus merula) are changed because of splits from extralimital species; (8) the distributional statement of 1 species (Oxyura jamaicensis) is changed because of a lump with an extralimital species; (9) 6 genera (Urile, Nannopterum Corthylio, Padda, Glaucestrilda, and Amphispizopsis) are added due to splits from other genera, resulting in changes to 9 scientific names (Urile penicillatus, U. urile, U. pelagicus, Nannopterum auritum, N. brasilianum, Corthylio calendula, Padda oryzivora, Glaucestrilda caerulescens, and Amphispizopsis quinquestriata); (10) 2 genera (Canachites and Philodice) are added due to splits from other genera, resulting in the loss of those genera (Falcipennis and Calliphlox, respectively) and changes to 3 scientific names (Canachites canadensis, Philodice bryantae, and P. mitchellii); (11) 1 genus (Ramphotrigon) is added because of a lump with another genus, resulting in the loss of that genus (Deltarhynchus) and a change to 1 scientific name (Ramphotrigon flammulatum); (12) 1 genus (Pseudoscops) is lost by merger with a genus already on the list, resulting in changes to two scientific names (Asio clamator and A. grammicus); (13) the scientific names of
... Recomendamos que A. dorsalis sea cambiado al ge*nero Anabazenops. Relaciones con otros grupos... more ... Recomendamos que A. dorsalis sea cambiado al ge*nero Anabazenops. Relaciones con otros grupos taxon6micos de la subfamilia Philydorinae son investigadas. ... 3): each gives a long series of slowly delivered, rough "chuck" notes that show Page 8. 390 ...
BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access t... more BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.
BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access t... more BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.
The following changes to the 7th edition (page numbers refer thereto) and its supplements result ... more The following changes to the 7th edition (page numbers refer thereto) and its supplements result from the Committee's actions: pp. xvii-liv. Increase the number in the title of the list of species to 2,178. Insert the following names in the proper position as indicated by the text of this supplement: Anthracothorax dominicus Hispaniolan Mango. Anthracothorax aurulentus Puerto Rican Mango. Cynanthus lawrencei Tres Marias Hummingbird. Cynanthus doubledayi Turquoise-crowned Hummingbird. Trochilus polytmus Red-billed Streamertail. Trochilus scitulus Black-billed Streamertail. Ramosomyia violiceps Violet-crowned Hummingbird. Ramosomyia viridifrons Green-fronted Hummingbird. Grus monacha Hooded Crane. (A) Macronectes halli Northern Giant-Petrel. (A) Chondrohierax wilsonii Cuban Kite. Strix virgata Mottled Owl. Strix nigrolineata Black-and-white Owl. Elaenia parvirostris Small-billed Elaenia. (A) Philohydor lictor Lesser Kiskadee. Herpsilochmus frater Rusty-winged Antwren. Hafferia zeledoni Zeledon's Antbird. Turdus naumanni Naumann's Thrush. (A) Saxicola maurus Asian Stonechat. (A) Anthus chii Yellowish Pipit. Sturnella lilianae Chihuahuan Meadowlark. Saltator grandis Cinnamon-bellied Saltator. Delete the following names: Anthracothorax dominicus Antillean Mango. Pampa excellens Long-tailed Sabrewing. Trochilus polytmus Streamertail. Leucolia violiceps Violet-crowned Hummingbird. Leucolia viridifrons Green-fronted Hummingbird. Ciccaba virgata Mottled Owl. Ciccaba nigrolineata Black-and-white Owl. Pitangus lictor Lesser Kiskadee. Herpsilochmus rufimarginatus Rufous-winged Antwren. Myrmeciza zeledoni Zeledon's Antbird. Saxicola torquatus Stonechat. (A) Anthus lutescens Yellowish Pipit. Saltator coerulescens Grayish Saltator. Move †Camptorhynchus labradorius to follow Polysticta stelleri in the linear sequence.
We report the results of systematic vascular plant and bird surveys in Seasonally Dry Tropical Fo... more We report the results of systematic vascular plant and bird surveys in Seasonally Dry Tropical Forest (SDTF) across leeward and windward elevation gradients (31–884 masl) in the Sierra Martín García (SMG), Dominican Republic. We expected to see gradual, systematic changes in plant distributions with elevation owing to the strong effect of topoclimate. In contrast, we predicted bird community composition to be related only weakly to elevation, because we expected bird distributions to be more strongly related to vegetation structure than composition. Based on 48 vegetation transects, we identified seven groups that differed in their species composition, which was correlated with elevation and precipitation. The most distinctive vegetation community occurs in dry, warm, and low elevations on the leeward slope, featuring large numbers of non‐woody indicator species (those species found frequently within one group but not in other groups) even though most of its trees and shrubs represe...
, and supplemented with more recent observations, represent the first comprehensive survey of thi... more , and supplemented with more recent observations, represent the first comprehensive survey of this globally significant island since 1927. All encounters of montane species are reported along with select species accounts for notable lower-elevation species. Numerous observations presented here suggest avifauna even more unique than previously reported. For example, we confirm a probable resident form of Peregrine Falcon (Falco peregrinus) and report the first observations and collected materials for a Blue-faced Parrotfinch (Erythrura trichroa) from Kolombangara. We observed all of the island's high-elevation endemics and found their relative abundances and patterns of occurrence to be consistent with those of an intact montane avifauna. Our findings suggest that despite large-scale modification of lowland habitat, montane forests on Kolombangara still maintain the full complement of endemic and other high elevation species described nearly 100 years ago, along with several additional taxa not previously recorded. However, incidental evidence suggests that forest change in the lowlands is impacting montane microclimates as indicated by extensive drying of epiphytic mosses at high elevations. Along with more recent collection of undescribed anurans, these findings confirm the global conservation significance of the montane forests and biodiversity on Kolombangara.
To evaluate the roles of Quaternary (< 2.6 Ma) climatic stability and geologic barriers (i.e. ... more To evaluate the roles of Quaternary (< 2.6 Ma) climatic stability and geologic barriers (i.e. the Andes Mountains) in shaping the modern community composition and patterns of endemism in Neotropical dry forest bird communities.
We report evidence of egg-laying in northern Florida by the Shiny Cowbird (Molothrus bonariensis)... more We report evidence of egg-laying in northern Florida by the Shiny Cowbird (Molothrus bonariensis). Examination of the ovary and oviduct of a female trapped in Alachua County, Florida in late June 2006 revealed ovulation and recent passing of eggs. Two other Shiny Cowbird females captured in late May and early June had convoluted oviducts but showed no other signs of recent egg-laying. These three specimens add to the few female Shiny Cowbirds captured in North America. Our observations represent further evidence that Shiny Cowbirds likely breed in North America and additional evidence of breeding outside of southern Florida.
Resumen. Una nueva subespecie de Sclerurus albigularis (S. a. kempffi) es descrito. El tipo-local... more Resumen. Una nueva subespecie de Sclerurus albigularis (S. a. kempffi) es descrito. El tipo-localidad es La Serrania Huanchaca, de los bosques AmazolÍicos del noreste del departamento Santa Cruz, Bolivia. La subespecie, la cual es distinctamente pálida, se encuentra en elevaciones más bajas y bosques más secos que donded ocurren las otras subespecies de S. albigularis. También es más pequeña que los subespecies que son más cercas geograficamente: S. a. zamorae y S. a. albicollis. S. a. zamorae se encuentra al margen oriente de los Andes del Perú; S. a. albicollis se encuentra en el norte de Bolivia. Como especie, S. albigularis se conforma basicamente a la Ley Ecogeográfica de Gloger: las poblaciones de las regiones más húmedas son las más profundamente pigmentadas, y las poblaciones en las regiones más secas son las más pálidas. En S. albigularis, tamaño no coresponde a localidad geográfica. Abstract. A new subspecies of Gray-throated Leaftosser (Sclerurus albigularis kempffi) is described from the Serrania Huanchaca, in lowland Amazonian forests in northeastern depto. Santa Cruz, Bolivia. This distinctly pale subspecies occurs at lower elevations and in drier forests than do other subspecies of S. albigularis. It is also smaller than the geographically nearest subspecies, which are found along the east slope of the Andes in Peru (S. a. z,,!morae) and northern Bolivia (S. a. albicollis). As a species, S. albigularis largely conforms to Gloger's Ecogeographlc Rule: populations in the most humid regions are the most richly pigmented, and populations in driest areas are palest. Geographical trends in size are lacking in this species.
BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access t... more BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.
RENNELL ISLAND LIES 168 km south of the main chain of the Solomon Islands (Figure 1). The avifaun... more RENNELL ISLAND LIES 168 km south of the main chain of the Solomon Islands (Figure 1). The avifauna of this large (676 km 2) uplifted coralline limestone island is indisputably distinct. Of 37 breeding land and freshwater bird species, five species and nine subspecies are endemic, and six additional subspecies are endemic to Rennell and nearby Bellona (a smaller raised limestone island 24 km northwest of Rennell). Ren
Classification and Nomenclature-North and Middle America. The Committee has continued to operate ... more Classification and Nomenclature-North and Middle America. The Committee has continued to operate in the manner outlined in the 42nd Supplement (Banks et al. 2000). During the past year, Douglas F. Stotz left the committee. Changes in this supplement include the following: (1) 3 species (Psittacara erythrogenys, Monticola saxatilis, and Sporophila bouvronides) are added to the main list on the basis of new distributional information, including one transferred from the Appendix; (2) 7 species (Antrostomus ekmani, Accipiter atricapillus, Corvus minutus, Delichon lagopodum, Chlorophonia sclateri, Chlorophonia flavifrons, and Melopyrrha taylori) are added to the main list because of splits from species already on the list; (3) 1 species name is changed (to Lepidothrix velutina) because of a split from an extralimital species; (4) the distributional statements of 3 species (Sclerurus mexicanus, Chlorothraupis carmioli, and Amaurospiza concolor) are changed because of splits from extralimital species; (5) 1 species (Empidonax occidentalis) is lost by merger with a species already on the list; (6) 1 species (Myiodynastes chrysocephalus) is removed due to transfer of a subspecies, rendering the species extralimital; (7) 1 genus (Microspizias) is added due to a split from another genus, resulting in a change to 1 scientific name (Microspizias superciliosus); (8) 3 genera (Mustelirallus, Rufirallus, and Periporphyrus) are added by merger with other genera, resulting in the loss of 4 genera (Neocrex, Cyanolimnas, Micropygia, and Rhodothraupis) and changes to 5 scientific names (Mustelirallus colombianus, M. erythrops, M. cerverai, Rufirallus schomburgkii, and Periporphyrus celaeno); (9) 1 genus (Myrmothera) is added due to a transfer of a species between genera, resulting in 1 change to a scientific name (Myrmothera dives); (10) a subfamily name is changed (to Florisuginae) because of nomenclatural priority; and (11) 2 species (Falco rufigularis and Amazona finschi) are added to the list of species known to occur in the United States. New linear sequences are adopted for species in a portion of the Rallidae, for species in the genus Psittacara, for genera and species in the Grallariidae, and for species in a portion of the Cardinalidae, all due to new phylogenetic data. Literature that provides the basis for the Committee's decisions is cited at the end of this supplement, and citations not already in the Literature Cited of the 7th edition (with supplements
This is the 21 st supplement since publication of the 7 th edition of the Checklist of North Amer... more This is the 21 st supplement since publication of the 7 th edition of the Checklist of North American Birds (American Ornithologists' Union [AOU] 1998). It summarizes decisions made between 15 April 2020 and 15 April 2021 by the American Ornithological Society's (formerly American Ornithologists' Union) Committee on Classification and Nomenclature-North and Middle America. The Committee has continued to operate in the manner outlined in the 42nd Supplement (Banks et al. 2000). During the past year, Blanca E. Hernández-Baños was added to the committee. Changes in this supplement include the following: (1) 4 species (Columba palumbus, Amazilis amazilia, Ichthyaetus ichthyaetus, and Helopsaltes certhiola) are added to the main list on the basis of new distributional information; (2) 6 species (Larus brachyrhynchus, Strix sartorii, Sitta insularis, Euphonia godmani, Basileuterus delattrii, and Melopyrrha grandis) are added to the main list because of splits from species already on the list; (3) 1 species (Cistothorus stellaris) is added to the main list because of a split from a species already on the list, and the English name of that species (C. platensis) is transferred to C. stellaris; (4) 1 species name is changed (to Polioptila bilineata) because of a split from an extralimital species; (5) 1 species name is changed (to Caracara plancus) because of a lump with an extralimital species, but with no change to the English name; (6) the English name and distributional statement of 1 species (Catharus dryas) are changed because of a split from an extralimital species; (7) the distributional statements of 5 species (Hydrobates castro, Thamnistes anabatinus, Ramphocaenus melanurus, Anthus lutescens, and Turdus merula) are changed because of splits from extralimital species; (8) the distributional statement of 1 species (Oxyura jamaicensis) is changed because of a lump with an extralimital species; (9) 6 genera (Urile, Nannopterum Corthylio, Padda, Glaucestrilda, and Amphispizopsis) are added due to splits from other genera, resulting in changes to 9 scientific names (Urile penicillatus, U. urile, U. pelagicus, Nannopterum auritum, N. brasilianum, Corthylio calendula, Padda oryzivora, Glaucestrilda caerulescens, and Amphispizopsis quinquestriata); (10) 2 genera (Canachites and Philodice) are added due to splits from other genera, resulting in the loss of those genera (Falcipennis and Calliphlox, respectively) and changes to 3 scientific names (Canachites canadensis, Philodice bryantae, and P. mitchellii); (11) 1 genus (Ramphotrigon) is added because of a lump with another genus, resulting in the loss of that genus (Deltarhynchus) and a change to 1 scientific name (Ramphotrigon flammulatum); (12) 1 genus (Pseudoscops) is lost by merger with a genus already on the list, resulting in changes to two scientific names (Asio clamator and A. grammicus); (13) the scientific names of
... Recomendamos que A. dorsalis sea cambiado al ge*nero Anabazenops. Relaciones con otros grupos... more ... Recomendamos que A. dorsalis sea cambiado al ge*nero Anabazenops. Relaciones con otros grupos taxon6micos de la subfamilia Philydorinae son investigadas. ... 3): each gives a long series of slowly delivered, rough &amp;amp;quot;chuck&amp;amp;quot; notes that show Page 8. 390 ...
BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access t... more BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.
BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access t... more BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.
The following changes to the 7th edition (page numbers refer thereto) and its supplements result ... more The following changes to the 7th edition (page numbers refer thereto) and its supplements result from the Committee's actions: pp. xvii-liv. Increase the number in the title of the list of species to 2,178. Insert the following names in the proper position as indicated by the text of this supplement: Anthracothorax dominicus Hispaniolan Mango. Anthracothorax aurulentus Puerto Rican Mango. Cynanthus lawrencei Tres Marias Hummingbird. Cynanthus doubledayi Turquoise-crowned Hummingbird. Trochilus polytmus Red-billed Streamertail. Trochilus scitulus Black-billed Streamertail. Ramosomyia violiceps Violet-crowned Hummingbird. Ramosomyia viridifrons Green-fronted Hummingbird. Grus monacha Hooded Crane. (A) Macronectes halli Northern Giant-Petrel. (A) Chondrohierax wilsonii Cuban Kite. Strix virgata Mottled Owl. Strix nigrolineata Black-and-white Owl. Elaenia parvirostris Small-billed Elaenia. (A) Philohydor lictor Lesser Kiskadee. Herpsilochmus frater Rusty-winged Antwren. Hafferia zeledoni Zeledon's Antbird. Turdus naumanni Naumann's Thrush. (A) Saxicola maurus Asian Stonechat. (A) Anthus chii Yellowish Pipit. Sturnella lilianae Chihuahuan Meadowlark. Saltator grandis Cinnamon-bellied Saltator. Delete the following names: Anthracothorax dominicus Antillean Mango. Pampa excellens Long-tailed Sabrewing. Trochilus polytmus Streamertail. Leucolia violiceps Violet-crowned Hummingbird. Leucolia viridifrons Green-fronted Hummingbird. Ciccaba virgata Mottled Owl. Ciccaba nigrolineata Black-and-white Owl. Pitangus lictor Lesser Kiskadee. Herpsilochmus rufimarginatus Rufous-winged Antwren. Myrmeciza zeledoni Zeledon's Antbird. Saxicola torquatus Stonechat. (A) Anthus lutescens Yellowish Pipit. Saltator coerulescens Grayish Saltator. Move †Camptorhynchus labradorius to follow Polysticta stelleri in the linear sequence.
We report the results of systematic vascular plant and bird surveys in Seasonally Dry Tropical Fo... more We report the results of systematic vascular plant and bird surveys in Seasonally Dry Tropical Forest (SDTF) across leeward and windward elevation gradients (31–884 masl) in the Sierra Martín García (SMG), Dominican Republic. We expected to see gradual, systematic changes in plant distributions with elevation owing to the strong effect of topoclimate. In contrast, we predicted bird community composition to be related only weakly to elevation, because we expected bird distributions to be more strongly related to vegetation structure than composition. Based on 48 vegetation transects, we identified seven groups that differed in their species composition, which was correlated with elevation and precipitation. The most distinctive vegetation community occurs in dry, warm, and low elevations on the leeward slope, featuring large numbers of non‐woody indicator species (those species found frequently within one group but not in other groups) even though most of its trees and shrubs represe...
, and supplemented with more recent observations, represent the first comprehensive survey of thi... more , and supplemented with more recent observations, represent the first comprehensive survey of this globally significant island since 1927. All encounters of montane species are reported along with select species accounts for notable lower-elevation species. Numerous observations presented here suggest avifauna even more unique than previously reported. For example, we confirm a probable resident form of Peregrine Falcon (Falco peregrinus) and report the first observations and collected materials for a Blue-faced Parrotfinch (Erythrura trichroa) from Kolombangara. We observed all of the island's high-elevation endemics and found their relative abundances and patterns of occurrence to be consistent with those of an intact montane avifauna. Our findings suggest that despite large-scale modification of lowland habitat, montane forests on Kolombangara still maintain the full complement of endemic and other high elevation species described nearly 100 years ago, along with several additional taxa not previously recorded. However, incidental evidence suggests that forest change in the lowlands is impacting montane microclimates as indicated by extensive drying of epiphytic mosses at high elevations. Along with more recent collection of undescribed anurans, these findings confirm the global conservation significance of the montane forests and biodiversity on Kolombangara.
To evaluate the roles of Quaternary (< 2.6 Ma) climatic stability and geologic barriers (i.e. ... more To evaluate the roles of Quaternary (< 2.6 Ma) climatic stability and geologic barriers (i.e. the Andes Mountains) in shaping the modern community composition and patterns of endemism in Neotropical dry forest bird communities.
We report evidence of egg-laying in northern Florida by the Shiny Cowbird (Molothrus bonariensis)... more We report evidence of egg-laying in northern Florida by the Shiny Cowbird (Molothrus bonariensis). Examination of the ovary and oviduct of a female trapped in Alachua County, Florida in late June 2006 revealed ovulation and recent passing of eggs. Two other Shiny Cowbird females captured in late May and early June had convoluted oviducts but showed no other signs of recent egg-laying. These three specimens add to the few female Shiny Cowbirds captured in North America. Our observations represent further evidence that Shiny Cowbirds likely breed in North America and additional evidence of breeding outside of southern Florida.
Resumen. Una nueva subespecie de Sclerurus albigularis (S. a. kempffi) es descrito. El tipo-local... more Resumen. Una nueva subespecie de Sclerurus albigularis (S. a. kempffi) es descrito. El tipo-localidad es La Serrania Huanchaca, de los bosques AmazolÍicos del noreste del departamento Santa Cruz, Bolivia. La subespecie, la cual es distinctamente pálida, se encuentra en elevaciones más bajas y bosques más secos que donded ocurren las otras subespecies de S. albigularis. También es más pequeña que los subespecies que son más cercas geograficamente: S. a. zamorae y S. a. albicollis. S. a. zamorae se encuentra al margen oriente de los Andes del Perú; S. a. albicollis se encuentra en el norte de Bolivia. Como especie, S. albigularis se conforma basicamente a la Ley Ecogeográfica de Gloger: las poblaciones de las regiones más húmedas son las más profundamente pigmentadas, y las poblaciones en las regiones más secas son las más pálidas. En S. albigularis, tamaño no coresponde a localidad geográfica. Abstract. A new subspecies of Gray-throated Leaftosser (Sclerurus albigularis kempffi) is described from the Serrania Huanchaca, in lowland Amazonian forests in northeastern depto. Santa Cruz, Bolivia. This distinctly pale subspecies occurs at lower elevations and in drier forests than do other subspecies of S. albigularis. It is also smaller than the geographically nearest subspecies, which are found along the east slope of the Andes in Peru (S. a. z,,!morae) and northern Bolivia (S. a. albicollis). As a species, S. albigularis largely conforms to Gloger's Ecogeographlc Rule: populations in the most humid regions are the most richly pigmented, and populations in driest areas are palest. Geographical trends in size are lacking in this species.
Uploads
Papers by Andrew Kratter