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Tag: "sparrows" at biology news

Eavesdropping comes naturally to young song sparrows

...opping on the phone calls of Americans, young song sparrows were listening to and learning the tunes sung by t... of Washington researchers exploring how male song sparrows (Melospiza melodia) acquire their song repertoires have found the first evidence that young birds ch...

Light guides flight of migratory birds

... Phillips' lab at Virginia Tech, captured Savannah sparrows in the Yukon before they headed south. She was able to demonstrate that the birds calibrate their magnetic compass based on polarized light patterns at sunset and sunrise. The research appears in the Aug. 11, 2006, issue of Science, in the article,...

New brain hormone puts brakes on reproduction

... by Tsutsui and Bentley in quail and white-crowned sparrows confirmed its role in turning down production of GnRH and thus switching off the gonads. While Bentley collaborated with Tsutsui to determine how GnIH works in birds, the two also teamed up with Kriegsfeld to explore the implications in mammals. Kri...

Wolves' top-down effect

...lows. Today, there is little trace of beavers, and sparrows have replaced the warblers in what is now a grassland meadow. These profound changes were driven by the absence of the wolf, a top predator. That's the compelling finding of the paper, "Human Activity mediates a Trophic Cascade caused by Wolves" that...

Displaced songbirds navigate in the high Arctic

... experimentally relocating migratory white-crowned sparrows (Zonotrichia leucophrys gambelii) from their breed...impossible for much of the summer. White-crowned sparrows are nocturnally migrating birds that breed in northern Canada and perform long migrations covering a...

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