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.

Have hummingbirds visited your feeders this season? Our appreciation for our tiny avian neighbors is well documented, which is why our eyes are always peeled for a glimpse of a hummingbird flitting ...

James Vancouver / Getty Images Rufous hummingbird (Selasphorus rufus) eating from flowers in a garden. When we see these birds they are typically migrating through Sonoma . (James Vancouver / Getty ...

With their quick-moving wings flapping up to 200 times a second while sometimes buzzing around and feasting on colorful flowers, hummingbirds can easily brighten a day. In addition to beauty, ...