My drakes do that every time they see me walking by their kiddi ( or should I say ducky) pool! They stretch their necks up and lift their tails when they make the frog noise too, so hilarious!My little guys were making what I call the 'bullfrog' sound yesterday, it was so funny. The low-pitched 'glunk' sound they make to impress the ladies. Accompanied of course by head bobbing. Hoping to see some eggs here soon.