Pigeon In Skinner Box
Photo Researchers, Inc.
Monkey Research
Photo Researchers, Inc.
Praying Mantis #10
Perennou Nuridsany
Olympic Marmot
Thomas And Pat Leeson
Wild Horses Mating
Michael Lustbader
Atlantic Puffins #5
John Shaw
Tabby Kitten & Great Dane Pup #7
Mark Taylor
Bighorn Sheep Dominance Display
Thomas And Pat Leeson
Roseate Spoonbills With Chick
Millard H. Sharp
Puppy And Kitten #1
Jane Burton
Retriever And Kitten
Jane Burton
Puppies At Halloween
Jane Burton
Retriever And Kitten #2
Jane Burton
Brown Bear Cubs
Ron Sanford
Atlantic Puffin #4
John Shaw
Atlantic Puffin #7
John Shaw
Violet-green Swallow
Richard Hansen
Atlantic Puffins #1
John Shaw
Sea Otters #9
Thomas And Pat Leeson
Great Horned Owl
Craig K. Lorenz
Harlows Monkey Experiment
Photo Researchers, Inc.
Marsh Wren
Richard Hansen
Red-crowned Cranes Courting
John Shaw
American Kestrel
Scott Linstead
Animal Friends #3
Mark Taylor
Animal Friends #6
Mark Taylor
American Alligator Alligator #1
John Serrao
Emperor Penguins With Chick On Feet #7
Greg Dimijian
American Bison Bull Flehmening
Thomas And Pat Leeson
Red-winged Blackbird #1
John Shaw
Small Emperor Penguin Chick
Greg Dimijian
Lion On The Hunt #1
John Shaw
Great Egret Courtship Display #2
Millard H Sharp
Eagle Harasses A Vulture
John Shaw
Lilac-breasted Roller, Maasai Mara
James Steinberg
Elephant Seal Male
Ron Sanford
Marabou Storks Scavenging At Restaurant
Ivan Kuzmin
Icelandic Horses #1
John Daniels
Kitten And Puppy #21
Jane Burton
Bighorn Rams Dominance Display
Thomas And Pat Leeson
Frigate Bird Displaying
Greg Ochocki
Black Guillemot With A Fish
John Shaw
Kitten & Pup Confrontation
Mark Taylor
Tabby Kitten & Great Dane Pup
Mark Taylor
Tabby Kitten & Great Dane Pup #1
Mark Taylor
Bichon Frise & Yorkshire Terrier
Mark Taylor
Bichon Frise & Yorkshire Terrier #1
Mark Taylor
Tabby Kitten and Border Collie
Mark Taylor
Tabby Kitten & Great Dane Pup #2
Mark Taylor
Bichon Frise & Yorkshire Terrier #2
Mark Taylor
Tabby Kitten & Great Dane Pup #3
Mark Taylor
Tabby Kitten & Great Dane Pup #4
Mark Taylor
Tabby Kitten & Border Collie #1
Mark Taylor
Tabby Kitten & Border Collie #2
Mark Taylor
Tabby Kitten & Bichon Frise
Mark Taylor
Tabby Kitten & Bichon Frise #1
Mark Taylor
Tabby Kitten & Great Dane Pup #5
Mark Taylor
Tabby Kitten & Border Collie #3
Mark Taylor
Tabby Kitten & Great Dane Pup #6
Mark Taylor
Tabby Kitten & Bichon Frise #2
Mark Taylor
Bichon Frise and Yorkshire Terrier #1
Mark Taylor
Bichon Frise and Yorkshire Terrier
Mark Taylor
Tabby Kitten & Great Dane Pup #8
Mark Taylor
Bichon Frise & Yorkshire Terrier #5
Mark Taylor
Anhinga Chicks
Mark Newman
Anhinga Chicks #1
Mark Newman
Anhinga Chick
Mark Newman
Common Moorhen Mother With Chick
Mark Newman
Anhinga Adult Feeding Chicks
Mark Newman
Anhinga Adult With Chicks
Mark Newman
Common Moorhen Mother With Chick #1
Mark Newman