It's turtle nesting season in this week's best animal pictures

An olive ridley turtle lays her eggs in the sand at Rushikulya Beach on Feb. 16. Thousands of olive ridley sea turtles started to come ashore in the last few days from the Bay of Bengal to lay their eggs on the beach, which is one of the three mass nesting sites in the Indian coastal state of Orissa.

The elephant enjoys a piece of birthday cake made of vegetables and fruit during her 56th birthday celebration at the Aurora zoo in Guatemala City on Feb. 19.

Look how happy she is!

This gorilla mother holds her baby as its half sister looks on at their enclosure in Pongoland in Leipzig, Germany, on Feb. 16. The baby gorilla was was born at the zoo on Dec. 4, 2016.

A peacock walks past a 3-month-old hippopotamus at the Le Cornelle Animal Park in Valbrembo, Italy, on Feb. 17.

A lesser flamingo is seen at the Le Cornelle Animal Park in Valbrembo, Italy, on Feb. 17.

A blue-and-yellow macaw is pictured at the Le Cornelle Animal Park in Italy on Feb. 17.