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 ...

Here is the list of most breathtaking and beautiful butterfly species in the world. The black swallowtail, also known as the eastern black swallowtail or American swallowtail, has black wings ...

Male blue-lined octopuses inject females with venom during mating to avoid being eaten by their partners, observations suggest 1. Blue-lined octopuses (Hapalochlaena fasciata) have paralysing ...