Male zebra longwing butterfly vision sticks to a duller pallette, perhaps for mating reasons. The genes that explain this may help unlock how differences between sexes evolve. By Veronique Greenwood ...

Mike Malloy Underside of the zebra longwing. Mike Malloy Zebra longwing butterfly. The Zebra longwing (Heliconius charitonius) are easy to recognize, not only by its slow, floating and sometimes ...

MALE zebra longwing butterflies sit on the pupae of females for up to 10 days before they hatch, ensuring they get first dibs at reproducing with them. But how do they know that they’re sitting on a ...

It’s always a treat to spot Zebra Longwing butterflies (Heliconius charithonia). These exotic-looking insects are common in Mexico and Central America, and they’re found year-round in parts of Texas ...

Sandy Jespersen wasn't looking for a rare butterfly. She was seeking shade from the hot sun at Brazos Bend State Park where she works as a volunteer. She headed for the canopy of trees at the ...