great blue herons are territorial in feeding grounds

aggressive agression aquatic ardea ardeidae attack attacking bill bird blue catfish chasing courtship crabs crayfish dancing defending diet dinner display dragonflies ecological ecology environment feathers feeding feet fish frogs grasshoppers great greatblueheron habitat herodias heron hunt impaling insects lizards males marsh marshgrass mean montezuma ornithology pelecaniformes predator prey refuge salamanders shallow sharp shoreline shrimps snakes spear stabbed standing success territorial wading waiting water waterfowl wetland wildlife wings