For the 56,576 species in the Class Aves (Birds), we average 371.87 observations each in our database; for the Gray Catbird, we have 60,612 observations. Compared to other species in this Class, this species is extremely common.
A two-sample t-test can be used to determine whether the trend in observations of the Gray Catbird 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 yes, changes in observation rate of this species do not significantly differ from changes in observation rate of its Class.
A Family of medium-sized passerinebirds with strongfeet, strong direct flight, and a preference for open country. They are gregarious and omnivorous, often preferring insects and fruit. Most have dark plumage with a metallic sheen.
Adult:
Head:Cap: blackBill:darkLength: shortBody:Underparts: pale grayUpperparts: slate grayTail:blackUndertail Coverts: reddish charcoal.
Size/Age/Growth:
About 8.5 to 9 inches long, with a wingspan of 11 to 12 inches. Adults weigh about 1.3 ounces.
The plumage and call of the catbird are quite distinctive.
Three species of mimids to compare: Brown Thrasher, Northern Mockingbird, and Gray Catbird. All sound similar, but are easily distinguished. Thrashers generally repeat phrases twice, then move on to the next phrase. Mockingbirds repeat phrases 3-7 times before moving on to the next phrase, while catbirds do not generally repeat phrases.
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.)
Brands, S.J. (comp.) 1989-2006. Systema Naturae 2000. The Taxonomicon. Universal Taxonomic Services, Amsterdam, The Netherlands. Accessed October 4, 2006.
Global Biodiversity Information Facility. Accessed March 03, 2008. http://www.gbif.org Mediated distribution data from 15 providers.
Parker III, T.A., D.F. Stotz, and
J.W. Fitzpatrick, and quot;Ecological and Distributional Databases for Neotropical Birds, and 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