Small but speedy. Tiny but aggressive. Little bodies, big appetites. Hummingbirds are a study in extremes. They are the lightest North American birds. Most weigh less than two pennies at 3 to 4 grams.

Hummingbirds have a Napoleon complex. Tiny yet tough, these avian friends are fiercely territorial and often startlingly ...

For several years I’ve written about Morning Joe, a congenial little Allen’s hummingbird who seemed content to perch just a few feet away on a garden agave as I enjoyed my first cup of coffee. We ...

Hummingbirds are known for their small stature and beautiful coloring. These little birds are not very peaceful; in fact, they arequite territorial. Male hummingbirds are aggressive towards other ...

Hummingbirds are tiny and delicate, but don’t be fooled: They are among the most aggressive birds in the avian kingdom. Their territorial fury is especially aimed at other hummingbirds. Competition ...

Two hummingbirds, not willing to share space at a feeder. Hummingbirds often fight or chase each other away in competition for food and territory. At first, I didn't know what I was seeing — a tiny ...

That trickery results in reduced aggression from other hummingbirds and increased access to nectar resources. "This research takes a mental model we've been describing for a while in our papers and ...

Hummingbirds may be tiny, but their behavior often surprises people who expect them to be gentle and easygoing. Instead of peaceful and laidback, these colorful birds can appear bold, feisty, and even ...