Only male blue morphos display the characteristic shimmering blue wings over the entire surface. The females are brown with smaller areas of blue interspersed. Luke says, 'The blue morpho makes my ...

A team of neurologists, environmentalists and bioengineers at the University of Queensland, in Australia, has found that male blue-lined octopuses paralyze females prior to mating to avoid being ...

After Hurricane Andrew ripped through South Florida in 1992, the already-scarce Miami blue butterfly almost went extinct: No one recorded a single sighting for years. Finally, in 1999, a cheer went up ...

After Hurricane Andrew ripped through South Florida in 1992, the already-scarce Miami blue butterfly almost went extinct: No one recorded a single sighting for years. Finally, in 1999, a cheer went up ...

With no sightings in two years, the rare Ogasawara blue butterfly, named after its island chain natural habitat far south of Tokyo and designated a national natural treasure, is considered extinct ...

The bill is thin and pale gray. Breeding male: blue-gray above, including most of head and back. Crown has a black line at the forecrown that extends along the sides of crown; white eye ring ...

The natural world is replete with hermaphrodites, animals that may outwardly appear male or female but have the reproductive organs of both. Their less common cousins are gynandromorphs ...