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Dendroica castanea

(Bay-Breasted Warbler)

Conservation Status

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Population Analysis

  • For the 56,576 species in the Class Aves (Birds), we average 371.87 observations each in our database; for the Bay-Breasted Warbler, we have 3,456 observations. Compared to other species in this Class, this species is somewhat common.
  • A two-sample t-test can be used to determine whether the trend in observations of the Bay-Breasted Warbler is the same as the trend in observations of Aves. Is this species just as common, as a proportion of all observations, as it once was? The answer is no, changes in observation rate of this species significantly differ from changes in observation rate of its Class. (t=14.393, p<0.001)
  • How do observation rates of the Bay-Breasted Warbler differ from those of Aves? To answer this, we examined the percentage of observerations for Aves that were observations of the Bay-Breasted Warbler each year. We then correlated this percentage with observation year. If observations of the Bay-Breasted Warbler are becoming more common relative to other species of Aves, the correlation should be positive, but if it is becoming less common, the correlation should be negative. In fact, the correlation is negative (r=-.72), with a negative slope (m = -.002), suggesting that the Bay-Breasted Warbler may be in decline relative to other species of Aves. This correlation is statistically significant. (F = 65.25, p<.05)
  • The scatter chart to the right shows the percentage of all observations for Aves each year that were observations of the Bay-Breasted Warbler.

Taxonomy

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Notes:

Name Status: Accepted Name. Latest taxonomic scrutiny: 17-Oct-2001

Physical Description

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Family Fringillidae:

A Family of seed-eating, small to moderately large passerine birds that have strong, stubby beaks, which in some species can be quite large. They have a bouncing flight, alternating flapping with gliding on closed wings. Most sing well.

Adult Summer Female:

Head: Crown: chestnut brown with black streaks Ear Coverts: dusky, with posterior creamy white patch Body: Rump: gray Underparts: pale chestnut mottled with creamy white Upperparts: gray with black streaks.

Adult Summer Male:

Head: Crown: chestnut brown Face: Chin: chestnut brown Color: black Neck: Sides: creamy buff patch Throat: chestnut brown Body: Sides: chestnut brown Underparts: buff Upperparts: gray with black streaks Tail: gray with black streaks; white spots on outer feathers.

Size/Age/Growth:

About 5.5 inches long, with a wingspan of 8.5 to 8.5 inches. Adults weigh about 0.5 ounces.

Images:

Distribution

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Range and Population

North America; Caribbean

Habitat

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Vegetation: tropical lowland evergreen forest, tropical lowland evergreen forest, second-growth forests and woodlands • Minimum Elevation: 0 meters • Maximum Elevation: 1,200 meters • Sensitivity to Disturbance: Low.

Diet

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Primarily: Insects Lesser Quantities of: Fruit

Reproduction

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  • Breeding Habitat: Woodland
  • Nest Location: Mid-story/canopy nesting
  • Nest Type: Open-cup
  • Clutch Size: 4-7
  • Length of Incubation: 12-13 days
  • Days to Fledge: 11-12

Migration

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Migratory

Similar Species

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Blackpoll Warbler, Pine Warbler

Members of the genus Dendroica:

There are approximately 144 species and subspecies in this genus. Here are just 100 of them: D. adelaidae (Adelaide's Warbler) · D. adelaidae adelaidae · D. adelaidae delicata · D. aestiva · D. aestiva aestiva · D. aestiva dugesi · D. aestiva rubiginosa · D. aestiva sonorana · D. americana · D. angelae (Elfin Woods Warbler) · D. auduboni · D. auduboni auduboni · D. auduboni memorabilis · D. caerulea · D. caerulescens (Black-Throated Blue Warbler) · D. caerulescens caerulescens (Black-Throated Blue Warbler) · D. caerulescens cairnsi · D. caerulescens ssp · D. castanea (Bay-Breasted Warbler) · D. cerula · D. cerulea (Cerulean Warbler) · D. chrysoparia (Golden-Cheeked Warbler) · D. coronata (Audubon's Warbler) · D. coronata audoboni · D. coronata auduboni (Audubon's Warbler) · D. coronata auduboni-group · D. coronata auduboni-type · D. coronata audubonii · D. coronata coronata (Yellow-Rumped Warbler) · D. coronata group · D. coronata hooveri · D. coronata hypochrysea · D. coronata memorabilis · D. coronata memorabilis-nigrifro · D. coronata nevadensis · D. coronata nigrifrons · D. coronata ssp · D. coronata x · D. delicata · D. discolor (Prairie Warbler) · D. discolor collinsi · D. discolor discolor · D. discolor paludicola (Florida Prairie Warbler) · D. dominica (Yellow-Throated Warbler) · D. dominica albilora · D. dominica dominica (Yellow-Throated Warbler) · D. dominica flavescens · D. dominica stoddardi (Stoddard's Yellow-Throated Warbler) · D. erithachorides · D. erithacorides · D. f · D. fusca (Blackburnian Warbler) · D. graciae (Grace's Warbler) · D. graciae decora · D. graciae graciae · D. graciae ornata · D. graciae remota · D. graciae x · D. graciae yaegeri · D. kirtlandii (Kirtland's Warbler) · D. maculosa · D. magnolia (Magnolia Warbler) · D. nigrescens (Black-Throated Gray Warbler) · D. nigrescens halsei · D. nigrescens halseii · D. nigrescens nigrescens · D. nigrescens ssp · D. nigrifrons · D. not · D. not hypochrysea · D. occidentalis (Hermit Warbler) · D. palmarum (Palm Warbler) · D. palmarum hypochrysea (Palm Warbler) · D. palmarum hypocrysea · D. palmarum hyporheysea · D. palmarum palmarum (Palm Warbler) · D. palmarum ssp · D. palmerum · D. pennsylvanica · D. penslyvanica · D. pensylvanica (Chestnut-Sided Warbler) · D. petechi · D. petechia (Yellow Warbler) · D. petechia aequatorialis · D. petechia aestiva · D. petechia aithocorys · D. petechia albicollis · D. petechia alsiosa · D. petechia amnicola · D. petechia areola · D. petechia aureola (Yellow Warbler) · D. petechia aurifrons · D. petechia babad · D. petechia bartholemica · D. petechia brewsteri (Yellow Warbler) · D. petechia bryanti · D. petechia castaneiceps · D. petechia cruciana · D. petechia dugesi · D. petechia eoa

Bibliography

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  • Alsop, Fred J. III. Birds of North America - Eastern Region. First American Edition. Smithsonian Handbooks. DK Publishing, Inc. 2001.
  • Banks, R. C., R. W. McDiarmid, A. L. Gardner, and W. C. Starnes 2003. Checklist of Vertebrates of the United States, the U.S. Territories, and Canada.
  • Banks, R. C., R. W. McDiarmid, and A. L. Gardner 1987. Checklist of Vertebrates of the United States, the U.S. Territories, and Canada. Resource Publication, no. 166. United States Department of the Interior Fish and Wildlife Service. Washington, D.C., USA. 79.
  • Ehrlich, P., Dobkin, D., and Wheye, D. (1988). The Birders Handbook: A Field Guide to the Natural History of North American Birds. New York: Simon and Schuster Inc. (info on clutch size, length of incubation, days to fledge and number of broods.)
  • Robbins, C.S., Bruun, B., Zim, H.S., (1966). Birds of North America. New York: Western Publishing Company, Inc. (Length and wingspan info.)

More Info

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Notes

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Contributors:

  • Bisby, F.A., Y.R. Roskov, M.A. Ruggiero, T.M. Orrell, L.E. Paglinawan, P.W. Brewer, N. Bailly, J. van Hertum, eds (2007). Species 2000 & ITIS Catalogue of Life: 2007 Annual Checklist. Species 2000: Reading, U.K.
  • Brands, S.J. (comp.) 1989-2007. Systema Naturae 2000. The Taxonomicon. Universal Taxonomic Services, Amsterdam, The Netherlands. Accessed March 21, 2007.
  • Global Biodiversity Information Facility. Accessed March 11, 2008. http://www.gbif.org Mediated distribution data from 14 providers.
  • Hines, J. E., Gregory Gough, J. R. Sauer, et al. USGS Patuxent Wildlife Research Center
  • Parker III, T.A., D.F. Stotz, and J.W. Fitzpatrick, &quot;Ecological and Distributional Databases for Neotropical Birds,&quot; in Neotropical Birds: Ecology and Conservation, by D.F. Stotz, T.A. Parker III, J.W. Fitzpatrick, and D.K. Moskovits (Chicago: University of Chicago Press, 1996). ISBN 0-226-64676-9.
  • Sauer, J. R., J. E. Hines, and J. Fallon. 2005. The North American Breeding Bird Survey, Results and Analysis 1966 - 2004. Version 2005.2. USGS Patuxent Wildlife Research Center, Laurel, MD
  • Sauer, J. R., S. Schwartz, and B. Hoover. 1996. The Christmas Bird Count Home Page. Version 95.1. USGS Patuxent Wildlife Research Center, Laurel, MD

Data Sources:

Accessed through GBIF Data Portal March 11, 2008:

  • Avian Knowledge Network: eBird
  • Avian Knowledge Network: Great Backyard Bird Count
  • Avian Knowledge Network: Project FeederWatch
  • Bird Studies Canada: Ontario Breeding Bird Atlas 1981-1985
  • Bird Studies Canada: Ontario Breeding Bird Atlas 2001-2005
  • Borror Laboratory of Bioacoustics
  • Canadian Biodiversity Information Facility: North West Territories and Nunavut Bird Checklist, Canada
  • Canadian Biodiversity Information Facility: Provincial Museum of Alberta, Edmonton, AB, Canada. Birds (Aves)
  • Canadian Biodiversity Information Facility: Royal British Columbia Museum
  • Canadian Museum of Nature: Canadian Museum of Nature Bird Collection
  • Cornell University Museum of Vertebrates: Bird Collection
  • EMAN Provider: PIROP (Shipboard Surveys)
  • Museum of Comparative Zoology, Harvard University: MCZ Ornithology Collection
  • Museum of Vertebrate Zoology: Terrestrial vertebrate specimens
  • New Brunswick Museum: NBM birds
  • Royal Ontario Museum: Bird specimens
  • UCLA-Dickey Bird Collection (UCLA-Dickey): Bird specimens
  • University of Colorado Museum: Zoological specimens
  • University of Michigan Museum of Zoology (UMMZ): Bird specimens

Identifiers:

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Last Revised: March 24, 2008