Hummingbirds comprise the family Trochilidae, among the smallest of birds, with most species measuring in the 3"-5" range. They weigh only a few grams.
They feature long slender needlelike bills adapted for reaching deep into tubular flowers to extract nectar.
Their diet consists of nectar from flowers (red is the favorite color), small insects such as aphids and spiders, and sometimes even pollen and sap.
Hummingbirds feed in many small meals, consuming small invertebrates and up to twelve times their own body weight in nectar each day.
Many plant species rely on hummingbirds for pollination and provide nectar and tiny insects in exchange. Hummingbirds staunchly and aggressively defend a feeding area, or feeder, even when not feeding.
The beat of their wings is so rapid, up to 55 times a second, that a "humming" sound is produced, and the wings appear blurred. They are the only bird species that can hover, and fly backwards, or even upside down. The ability to hover allows the hummingbirds to sip the nectar of plants and flowers.
A hummingbird can't walk or hop, but can shuffle with its extremely short legs, which are not very strong.