Butterfly ball | Africa
After heavy rain, a mass of butterflies will take to the air to mate in their thousands.Tweet
Langurs free-running in the city | Planet Earth II
An alpha male langur takes part in a high speed chase across city rooftops to defend his females from marauding younger males.
An Alligator's Song | Natural World
Male alligators serenade females by emitting a low frequency bellow.