Ruby-throated Hummingbirds are able to fly across the Golf of Mexico, a distance of 500 miles, in one 20-hour non-stop flight. This requires more calories than the bird’s weight, so they prepare by doubling their fat mass. They expend the entire caloric reserve during the flight.

Ruby-throated hummingbird

The ruby-throated hummingbird (Archilochus colubris) is a species of hummingbird that generally spends the winter in Central America, Mexico, and Florida, and migrates to Canada and other parts of Eastern North America for the summer to breed. It is by far the most common hummingbird seen east of the Mississippi River in North America.

Description

Juvenile male ruby-throated hummingbird hovering

This hummingbird is from 7 to 9 cm (2.8 to 3.5 in) long and has an 8 to 11 cm (3.1 to 4.3 in) wingspan. Weight can range from 2 to 6 g (0.071 to 0.212 oz), with males averaging 3.4 g (0.12 oz) against the slightly larger female which averages 3.8 g (0.13 oz). Adults are metallic green above and grayish white below, with near-black wings…. Continue Reading (8 minute read)