A white-breasted, female frigatebird observes the courtship display of her male partner. The two are part of a colony on Isla Genovesa, or Tower Island, in Ecuador’s Galápagos Islands.

It takes about 50 days for a magnificent frigatebird chick to hatch. Both the male and female take turns incubating the egg and later feeding the chick. In its early days, one parent always stays ...