Tag: "warbler" at biology news
Two warbler species find the West isn't big enough for both of them
...d so far, and current trends would mean the hermit warbler
probably will become extinct in another 5,000 year...ey are running out of places to go." A Townsend's warbler
is a small songbird with yellow and black streaking on the sides and a dark crown, throat and upper ...
Using science to restore habitat for declining species
...ching the ecology and demographics of the cerulean warbler
for over two decades. Hamel is part of a new inter...nal effort to determine the status of the cerulean warbler
in both the breeding and nonbreeding ranges and to promote conservation efforts based on sound scien...
Keeping populations of cerulean warbler healthy
... currently known about the biology of the cerulean warbler
and the research questions that remain to be answe...ng. "Most glaring is our ignorance of the cerulean warbler
during the non-breeding season," says Hamel. "So far, we only have two published studies from South ...
'Snowbirds' versus real birds
...a. The species in this study is a small, migratory warbler
called the American redstart. Until now, understanding how and why these migratory populations are declining has been a problem, since it is difficult to track individuals throughout their yearly travels. A new technique for detecting "biological si...
Riparian birds can rebound after cows are gone
...l "species of special concern", such as the yellow warbler
and summer tanager. Only one of the species that increased (the common raven) also increased elsewhere in the region during the study period, suggesting that the increases were due to getting rid of the cows. Three of the species that declined in th...
Researchers link migratory birds' winter, summer ranges
...ummer and winter ranges of the black-throated blue warbler
by analyzing stable isotopes in feathers. The rese...be able to link changes in the black-throated blue warbler
abundances to habitat change in both its wintering and breeding areas," said Richard Holmes, Dartmou...
Chemical evidence proves the old adage, Birds of a feather flock together
...ribbean, he said, noting that attempts at tracking warbler
migrations with radio transmitters or DNA sampling...tron. When Chamberlain and his co-workers analyzed warbler
feathers collected at various U.S. and Canadian breeding grounds in 1997, they discovered that the r...
Biologists uncover Darwins missing evidence for divergence of species in a warblers song
...s in which they played recordings of male greenish warbler
songs and judged the response of other birds in th...ore ways to be complex than simple. "The greenish warbler
is the first case in which we can see all the steps that occurred in the behavioral divergence of tw...
Research indicates global warming could impact songbird populations
...our study," said Holmes. The black-throated blue warbler
is a member of the group of birds known as Neotrop...it could increase the chances of having years when warbler
survival and reproduction rates reach extreme lows, perhaps even approaching zero," Sillett said. "M...