Stock Photo - The female gentoo penguins at Penguins Rock at RZSS Edinburgh Zoo want only one thing this penguin breeding season and that’s to be wooed with a nice, shiny pebble. Keepers at RZSS Edinburgh Zoo placed the annual penguin nest rings and pebbles into Penguins Rock on 1 March to kick off the penguins’ annual breeding season. The pebbles are the gentoos’ version of engagement rings, which the males use to court a potential mate. As soon as the pebbles were placed in Penguins Rock, the black and white birds made a mad dash to pick out the perfect pebble in order to woo a future partner. Featuring: Atmosphere Where: Edinburgh, United Kingdom When: 02 Mar 2016 Credit: Attwood/WENN.com