White-winged Junco groups of the Dark-eyed Junco
I conducted song playbacks on the territories of 30 male Dark-eyed Juncos
(Junco hyemalis) located at Mountain Lake Biological Station and the grounds of Mountain Lake Hotel in Pembroke, Virginia, USA (37[degrees]22'N, 80[degrees]32'W).
In Angelina County, seeds of Amaranthus, Ambrosia, Digitaria, and Panicum comprised almost 70% of identifiable seeds in dark-eyed junco
digestive tracts; consumption and availability percentages of these genera were similar (Table 4).
The abundance and quality of food could also vary geographically and influence trait expression and evolution among the Dark-eyed Junco
Effects of captivity and testosterone on the volumes of four brain regions in the Dark-eyed Junco
breeding at 2,000 m also had 18% higher survival compared to those at low elevation on the same mountain (1,000 m; Bears et al.
georgiana White-throated Sparrow Zonotrichia albicollis Dark-eyed Junco
Junco hyemalis Management type Common name Mowed Unmowed American Kestrel 0.
corax Common Raven Uncompacted Homed Lark Erentophila alpestris Black-capped Chickadee Poecile atricapillus Uncompacted Dark-eyed Junco
Junco hyemalis Uncompacted Snow Bunting Plectrophenas nivalis Uncompacted Snow Bunting Hard crusted Pine Grosbeak Pinicola enucleator Uncompacted House Finch Carpodacus mexicanus Uncompacted Common Redpoll Carduelis flammea Uncompacted Common Redpoll Uncompacted American Goldfinch C.
The most abundant species were Yellow-rumped Warblers and Dark-eyed Juncos
(Junco hyemalis), which together accounted for 41% of the migrant passerine populations estimated.
Species numbers and window at which fatalities occurred were: two Northern Cardinals and one Dark-eyed Junco
at the clear glass control; two White-throated Sparrows, two Song Sparrows (Melospiza melodia), and one House Sparrow at the complete UV-absorbing film covering; and one White-throated Sparrow, one Song Sparrow, and one House Sparrow at the vertically oriented 2.
Species with [greater than or equal to] 10 dead individuals (this level appeared to be a natural break in the data) included White-throated Sparrow (Zonotrichia albicollis), Ovenbird (Seiurus aurocapilla), American Robin (Turdus migratorius), Swainson's Thrush (Catharus ustulatus), Dark-eyed Junco
(Junco hyemalis), Ruby-throated Hummingbird (Archilochus colubris), and Northern Cardinal.
crissalis Field Sparrow Spizella pusilla Lark Sparrow Chondestes grammacus Dark-eyed Junco
Junco hyemalis Song Sparrow Melospiza melodia Painted Bunting Passerina ciris Icteridae (20 species) Red-winged Blackbird Agelaius phoeniceus Yellow-headed Blackbird Xanthocephalus xanthocephalus Boat-tailed Grackle Quiscalus major Great-tailed Grackle Q.
The gynandromorph we observed fed amongst conspecifics in addition to other species such as Black-capped Chickadees (Poecile atricapillus), Dark-eyed Juncos
(Junco hyemalis), Song Sparrows (Melospiza melodia), and Mourning Doves (Zenaida macroura).
Studying dark-eyed juncos
, Whittaker's team compared which were more effective - chemical signals or size and attractive plumage.
Atwell, a population of dark-eyed juncos
that became established in the urban environment of San Diego County, Calif.