Combining breeding bird survey and distance sampling to estimate density of migrant and breeding birds. Somershoe, S. G., Twedt, D. J., & Reid, B. Condor, 108(3):691–699, Tennessee Wildlife Resources Agency, Ellington Agricultural Center, P.O. Box 40747, Nashville, TN 37211, United States, 2006.
abstract   bibtex   
We combined Breeding Bird Survey point count protocol and distance sampling to survey spring migrant and breeding birds in Vicksburg National Military Park on 33 days between March and June of 2003 and 2004. For 26 of 106 detected species, we used program DISTANCE to estimate detection probabilities and densities from 660 3-min point counts in which detections were recorded within four distance annuli. For most species, estimates of detection probability, and thereby density estimates, were improved through incorporation of the proportion of forest cover at point count locations as a covariate. Our results suggest Breeding Bird Surveys would benefit from the use of distance sampling and a quantitative characterization of habitat at point count locations. During spring migration, we estimated that the most common migrant species accounted for a population of 5000-9000 birds in Vicksburg National Military Park (636 ha). Species with average populations of >300 individuals during migration were: Blue-gray Gnatcatcher (Polioptila caerulea), Cedar Waxwing (Bombycilla cedrorum), White-eyed Vireo (Vireo griseus), Indigo Bunting (Passerina cyanea), and Ruby-crowned Kinglet (Regulus calendula). Of 56 species that bred in Vicksburg National Military Park, we estimated that the most common 18 species accounted for >8150 individuals. The six most abundant breeding species, Blue-gray Gnatcatcher, White-eyed Vireo, Summer Tanager (Piranga rubra), Northern Cardinal (Cardinalis cardinalis), Carolina Wren (Thryothorus ludovicianus), and Brown-headed Cowbird (Molothrus ater), accounted for >5800 individuals. © The Cooper Ornithological Society 2006.
@ARTICLE{Somershoe2006,
  author = {Somershoe, S. G. and Twedt, D. J. and Reid, B.},
  title = {Combining breeding bird survey and distance sampling to estimate
	density of migrant and breeding birds},
  journal = {Condor},
  year = {2006},
  volume = {108},
  pages = {691--699},
  number = {3},
  abstract = {We combined Breeding Bird Survey point count protocol and distance
	sampling to survey spring migrant and breeding birds in Vicksburg
	National Military Park on 33 days between March and June of 2003
	and 2004. For 26 of 106 detected species, we used program DISTANCE
	to estimate detection probabilities and densities from 660 3-min
	point counts in which detections were recorded within four distance
	annuli. For most species, estimates of detection probability, and
	thereby density estimates, were improved through incorporation of
	the proportion of forest cover at point count locations as a covariate.
	Our results suggest Breeding Bird Surveys would benefit from the
	use of distance sampling and a quantitative characterization of habitat
	at point count locations. During spring migration, we estimated that
	the most common migrant species accounted for a population of 5000-9000
	birds in Vicksburg National Military Park (636 ha). Species with
	average populations of >300 individuals during migration were: Blue-gray
	Gnatcatcher (Polioptila caerulea), Cedar Waxwing (Bombycilla cedrorum),
	White-eyed Vireo (Vireo griseus), Indigo Bunting (Passerina cyanea),
	and Ruby-crowned Kinglet (Regulus calendula). Of 56 species that
	bred in Vicksburg National Military Park, we estimated that the most
	common 18 species accounted for >8150 individuals. The six most abundant
	breeding species, Blue-gray Gnatcatcher, White-eyed Vireo, Summer
	Tanager (Piranga rubra), Northern Cardinal (Cardinalis cardinalis),
	Carolina Wren (Thryothorus ludovicianus), and Brown-headed Cowbird
	(Molothrus ater), accounted for >5800 individuals. © The Cooper Ornithological
	Society 2006.},
  address = {Tennessee Wildlife Resources Agency, Ellington Agricultural Center,
	P.O. Box 40747, Nashville, TN 37211, United States},
  comment = {http://www.pwrc.usgs.gov/prodabs/ab04060906/6599_Somershoe.pdf},
  file = {Somershoeetal2006.pdf:Somershoeetal2006.pdf:PDF},
  keywords = {Breeding bird survey, Density, Detection probability, Distance sampling,
	Loess bluff forest, Migration},
  owner = {Tiago},
  subdatabase = {distance},
  timestamp = {2006.11.28}
}

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