Newts

Several years ago a heron visited our garden pond and during a brief period when it wrought havoc amongst the resident frogs it also pecked a hole in the liner. Since then the water level has sunk so that it's only a few inches deep most of the time. But the upside to having a leaking pond is that the shallow water suits breeding newts just fine and it's easy to watch their antics during the breeding season.

This is a male in alligator mode: legs back, tail undulating, just a like a 'gator in the Everglades (if you've got a vivid imagination)