The documentation of the Swamp Sparrow
(Melospiza georgiana) during this study increases the avifauna listing for the state of Nuevo Leon to 366 species.
026; Kessler and Avise, 1985) from the song sparrow to its nearest relative [either the swamp sparrow
(Melospiza georgiana) or Lincoln's sparrow (M.
Anderson took the wing-waving robosparrow to a swamp sparrow breeding ground in Pennsylvania and placed it in the territories of live males.
Washington, January 30 ( ANI ): Male swamp sparrows use wing waves as an aggressive signal to defend their territories and mates from intruding males, according to a new study.
Species targeted during the passive observation period included: marsh wren, yellow warbler, common yellowthroat, song sparrow, swamp sparrow, and red-winged blackbird.
salicaria variables did not improve the fit of an intercept-only model for the yellow warbler, common yellowthroat, and swamp sparrow, so these variables were not included in models for these species.
We considered additional models for the swamp sparrow and Virginia rail.
Histograms of species-specific counts averaged across our two visits to each survey point indicated that a variety of statistical distributions was present, with some species showing normal distributions (yellow warbler, common yellowthroat, swamp sparrow, red-winged blackbird), others with Poisson distributions (Virginia rail, song sparrow) and one with a zero-inflated distribution (marsh wren).
The researcher said that the study showed that, when challenged, the male Swamp Sparrow escalates its vocal performance by increasing the frequency range and the speed of its song.
The slow trills of the Swamp Sparrows can be heard during spring and summer across the Eastern and Central North American wetlands.
We notice that we're getting less of some species, like swamp sparrows
," says Rodney Olsen, who rims the bird-banding project at the observatory.
Red-winged blackbirds and swamp sparrows
sing from the cattails, and young boys are fishing in the pond, their bicycles haphazardly piled next to the dock.
Geese and swans grace the Mohawk River, and marsh-loving red-winged blackbirds and swamp sparrows
are also abundant.
Swamp rose clumps in virtually any wet landscape area form a favorite nesting site for song and swamp sparrows
and common yellowthroats,' he says.
Tom said he saw a few swamp sparrows
when he helped out with the Athol count, and a rusty blackbird and a yellow bellied sapsucker when he was counting in Groton.