(hummingbird eggs gestation period) The female hummingbird will incubate the eggs usually for 16 to 18 days (hummingbird eggs gestation period) or up to three weeks if the weather happens to be cooler. She tries to maintain a temperature around 96 degrees. read more
(Thanks to John Phillips of Santa Cruz, California, for submitting this question to Operation RubyThroat.) In the Ruby-throated Hummingbird, incubation--which is done only by the female--usually lasts 16-18 days, sometimes longer during cool weather. read more
When a hummingbird lays her eggs, she usually lays two oblong eggs, around 1/2 inch long and 1/3 inch wide, though some species may be a bit larger or smaller. Depending on the species, she may spend less than a minute or up to three hours at a time sitting on her eggs, taking breaks of less than a minute to half an hour. read more