More than 500 insects live and feed on oaks, providing food for Wilson's warblers, American redstarts, common yellowthroats
and other insect-eating migrants rely on oaks' "fast food" stops along the way.
By June post-burn, as the mean vegetation height approached 140 cm, the dominant species once again were red-winged blackbirds (Agelaius phoeniceus), common yellowthroats
(Geothlypis trichas) and swamp sparrows (Melospiza georgiana).
Between 1991 and 2002, Brush (2005) found a population of five or more territories of Common Yellowthroats
during the breeding season at Santa Ana National Wildlife Refuge (26[degrees] 04'24"N, 98[degrees] 08'58"W, 23-40 m elevation; hereafter, Santa Ana NWR) and smaller numbers at other locations in Hidalgo County, Texas.
(162.) See generally Buck et al., supra note 44, at 156-57 (examining how a scientist's personal values or the influence of interest groups may threaten the objectivity of science by extrapolating from the cases of Wisconsin's yellowthroats
and the snail darter).
American goldfinches, red-winged blackbirds, common yellowthroats
(Geothlypis trichas), and bobolinks (Dolichonyx oryzivorus) were more abundant (all P < 0.05) in NWSG than in airfield grasslands (Table 3).
At the Dead Creek Bird Observatory, where Claire does the banding, volunteers see 30 to 40 different species of birds over 10 weeks during the summer, including song sparrows, yellow warblers, cedar waxwings, gray catbirds, American goldfinches, and common yellowthroats
. Banders there have witnessed some bird populations shrinking.
Indigo buntings, yellowthroats
, black-and-white warblers, give me a kick, as does the boar bear's hibernation site under a knob on the ridge facing my house, about halfway between where the ravens nest and the coyotes den.
Though breeding was suspected in the Ballona area (location unknown) on 17 July 1995 (copulation observed, LACBBA), it was not confirmed until 2004 when a juvenile was observed being fed by Common Yellowthroats
at BFM on 04 July (DSC).
Others: American redstarts (eastern half of the country and upper Midwest), common yellowthroats
(throughout the United States) and yellow-rumped warblers (throughout most of the country except in areas of the Midwest)
Clay-colored Sparrows (Spizella pallida) and Common Yellowthroats
(Geothlypis trichas) were most abundant >8 yr postfire.
Cedar bogs support high breeding bird densities (425 to 554 pairs per 100 acres or 40 ha) of species such as ovenbirds (Seiurus aurocapillus), yellowthroats
(Geothlypus trichas), and prairie, prothonotary, and hooded warblers (Dendroica discolor, Protonotaria citrea, and Wilsonia citrna, respectively).