Tag: parasitism

April 7, 2020

Blackbirds heed warbler warnings about cowbird danger

To keep their nests safe, blackbirds are homing in on warbler warning signals about dangerous brood parasitic cowbirds. But the exchange is not one-sided — previous research has found that...

October 17, 2017

WSB study: Grassland passerine nest survival goes up in flames

For decades, wildlife managers have used prescribed fires to limit woody vegetation on North America’s grasslands, maintaining them much as natural fires once did. Recent research conducted on the North...

June 7, 2017

Cowbirds eye egg size for nest selection

The brown-headed cowbird (Molothrus ater) may not build nests or raise young, but it does seem to take steps to help its offspring’s survival. When it lays eggs in the...