<Tr> <Th_colspan="2"> Synonyms </Th> </Tr> <Tr> <Td_colspan="2"> <P> Trochilus colubris </P> </Td> </Tr> <P> The ruby - throated hummingbird (Archilochus colubris) is a species of hummingbird that generally spends the winter in Central America and migrates to 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 . </P> <P> 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 greyish white below, with near - black wings . Their bill, at up to 2 cm (0.79 in), is long, straight, and very slender . As in all hummingbirds, the toes and feet of this species are quite small, with a middle toe of around 0.6 cm (0.24 in) and a tarsus of approximately 0.4 cm (0.16 in). The ruby - throated hummingbird can only shuffle if it wants to move along a branch, though it can scratch its head and neck with its feet . </P>

Where do ruby throated hummingbirds spend the winter