A Forster's tern at its nest. Image note: small size, dense plate.

An adult Forster's tern at its nest on muskrat house. Image note: side view.

A Forster's tern at nest with an open mouth. Image note: large size.

An adult Forster's tern at its nest. Image note: small size.

An adult Forster's tern at its nest. Image note: upright plate.

An adult Forster's tern at its nest, showing three eggs.

A Forster's tern nest and three eggs on muskrat house.

A barn swallow perched on a post. Image note: side view.

A barn swallow perched on a post. Image note: side view.

A barn swallow at the edge of nest with eggs showing.