Douglas Caldwell:
Squacco Heron (Ardeola ralliodes)
Douglas Caldwell:
"The Tortoise and the Hare-on"
Douglas Caldwell:
Black-crowned Night Heron (nycticorax nycticorax)
Douglas Caldwell:
Great Blue Heron (juvenile)
Douglas Caldwell:
Great Blue Heron (Ardea herodias)
Douglas Caldwell:
Black-crowned Night Heron (nycticorax nycticorax)
Douglas Caldwell:
Black-crowned Night Heron (Nycticorax nycticorax)
Douglas Caldwell:
Black-crowned Night Heron (Nycticorax nycticorax)
Douglas Caldwell:
Great Blue Heron (ardea herodias)
Douglas Caldwell:
Great Blue Heron (Ardea herodias) Minnesota Valley National Wildlife Refuge
Douglas Caldwell:
Purple Heron (Ardea purpurea)
Douglas Caldwell:
Gray Heron (Ardea cinerea)
Douglas Caldwell:
Great Blue Heron (Ardea herodias)
Douglas Caldwell:
Great Blue Heron (Ardea herodias)
Douglas Caldwell:
Great Blue Heron (Ardea herodias)