The color change, driven by hormones, seems aimed at preventing males from accidentally mating with each other.
The Weather Network on MSN
They aren't celebrating the World Series. Here's why blue jays are loud in fall
Some of their predators, like hawks, are also on the move. If a blue jay catches a glimpse of one, it will chirp to let its ...
Ready to do some bird-watching right from your window? As the leaves start to change and the air gets crisp, your backyard ...
Ron Canterbury has been studying birds for decades. Now, the professor is sounding the alarm about their possible extinction.
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