Two Great Blue Herons face off...

Evening was falling quickly, and the sun’s light was nothing more than a rosy wash over the waters at Quick Point Nature Preserve on Longboat Key, Florida (where Rick, Matty and I were vacationing last March). A flock of Ibis, several Little Blue Herons and Snowy Egrets, and a single Great Blue Heron were fishing in the shallows. The water was still and the birds were quiet until a second Great Blue Heron decided he wanted to fish right where the first Great Blue Heron had set up camp. As he coasted in for a landing, First Heron immediately showed his displeasure by spreading his wings and raising his head in a warning.

First Heron wasted no time defending his territory and immediately went into a threat display.

...he really does look taller, bigger, and scarier!

First Heron was vehement in his display and walked around in this posture eyeing the interloper.

Second Heron as he coasted in closer.

As soon as he landed, Second Heron answered back with his own threat posture, but he wasn't quite as convincing.

He spread his wings...

...and lifted his head, but never quite as high as First Heron.

...a feeble attempt at best! He soon flew off...

First Heron victorious!

Rick, Matty and I really enjoyed watching this behavior. At first we wondered if the two herons were engaging in courtship behavior, but their body language soon let us know it was a threat display. At the heronry in Cincinnati, we've seen a lot of courtship displays in the trees, but we were never lucky enough to witness threat postures and displays because the birds are too timid to fish near humans.