(41) The same mother duck and her duckling.

(42) Here's a 100% crop from a image of a green heron (Burorides virescens). I saw it at the Panther Hollow pond, where it cheerfully kept its distance and forced me to use the Tiffen 2X to get a remotely decent shot.

(43) A female mallard calmly poses.

(44) Bald eagle at the National Aviary.

(45) King vultures have rather funky colors.