Bird of the month: Ruby-throated hummingbird.

Description: The most common hummingbird in the Eastern United States, the ruby-throated averages 3 inches long and weighs 1/10 or 2/10 ounce. The birds have bright green backs, and the males have bright red throats that can look dark at times.

Nesting habits: The females in Florida build their nests in April on slender tree branches. They’re usually made of plant fiber and spider silk and are about 2 inches across and an inch deep. The female lays one to three eggs, about 1/2 inch long.

Notes: Some ruby-throated hummingbirds stay in South Florida year around, but most in the rest of the state and the country winter in Mexico and South America, returning in March. They’re solitary birds. Males and females only get together to mate, and the males often migrate south as early as August.