White Birch Leaf Edge Caterpillar, study for book Concealing Colouration in the Animal Kingdom
Blue Jays in Winter, study for book Concealing Colouration in the Animal Kingdom
N Am. Indians, study folder for book Concealing Colouration in the Animal Kingdom.
Sphinx Caterpillar, study for book Concealing Colouration in the Animal Kingdom
White Flamingoes, study for book Concealing Colouration in the Animal Kingdom
Photo of marsh, study folder for book Concealing Colouration in the Animal Kingdom