it would cost them roughly half as much energy as flapping Hummingbirds are one of nature’s most energetic fliers and the only birds to hover in the air by relying on their strength alone.

It is definitely feeling “springy” this week as the Spring Break approaches for the area schools. I found a hummingbird flag hanging on the front porch which means those ruby-throated gems — the ...

Is there not an error in the letter of NATURE (p. 312)? The writer there suggests, as it seems to me, that a bird could maintain a position of rest, with respect to ...