Predation of White-crowned Sparrow
nestlings by the Western Terrestrial Garter Snake in San Francisco, California.
BIRD SUET THISTLE BLACK OIL SUNFLOWER SEED CARDINAL * * BLACK-CAPPED CHICKADE * * CAROLINA CHICKADEE * * HOUSE FINCH * * PURPLE FINCH * * NORTHERN FLICKER * AMERICAN GOLDFINCH * * BLUE JAY * * DARK-EYED JUNCO * NUTHATCH * * PINE SISKIN * * WHITE-CROWNED SPARROW
* HOUSE SPARROW * TUFTED TITMOUSE * * TOWHEE * DOWNY WOODPECKER * * HAIRY WOODPECKER * * RED-BELLIED WOODPECKE * * CAROLINA WREN * * HOUSE WREN * *
Studies that have investigated this aspect of over-winter ecology have either been based on very small sample sizes (n = 1 American tree sparrow; Brooks 1985) or provide evidence of very low over-winter site fidelity (white-crowned sparrow
: 6.34%; Gimpel et al.
Surprise arrival was a White-crowned Sparrow
from North America, found at Woolston Eyes NR, near Warrington.
This has been shown to be true for the Zebra finch (Taeniopygia guttata), the White-crowned sparrow
(Zonotrichia leucophrys), and the Song sparrow (Melospiza melodia).
Different animals, such as or ca whales and white-crowned sparrow
also use different dialects.
The numbers of new cells is so low that trying to identify and quantify if dying cells are being replaced and if so, the steps that are involved, is much more difficult than when using a songbird like Gambel's white-crowned sparrow
, Larson and Brenowitz said.
They can learn to whistle the white-crowned sparrow
call, asserting a song of place, as they play beside daylighted and restored creeks in all corners of the city.
The bird they studied is the white-crowned sparrow
, a small bird that sports a jaunty white cap with black stripes.
In experiments like this in other species, such as the white-crowned sparrow
, biologists in the middle of the last century came up with a basic scenario for how birds learn to sing.
The two types of atresia, non-bursting atresia (Type 1) and bursting atresia (Type 2), described in the ovary of the domestic hen and white-crowned sparrow
(Gupta et al., 1988; Kern), were seen in small and larger follicles of Nothura maculosa, respectively.
Because of the mainland connection, the avifauna of the Ungava Peninsula's Arctic ecoclimatic province is an interesting mix of northward-extending boreal species (e.g., common loon, Wilson's snipe, and white-crowned sparrow
) and southern-reaching Arctic species (e.g., king eider, dunlin, and snowy owl).