Best Wildlife Photos of the Week

Pearl mullets, an endemic fish species found only in Van Lake in Turkey, jump through a waterfall during their spring migration. Pearl mullets are the only species able to survive in the salty, alkaline waters of the lake but swim upstream to lay eggs in freshwater rivers.
Photograph: Sedat Suna/EPA

A chequered skipper butterfly. The species has been reintroduced in a Northamptonshire forest in England after disappearing in 1976
Photograph: Adam Gor/Butterfly Conservation/PA

A bird rests on the head of a white-tailed deer roaming free in San Jose Villanueva, El Salvador.
Photograph: Marvin Recinos/AFP/Getty Images