The book is available at Hathi Trust (I have not checked for other online sources).
Why the Blackbird is Black
Why the Eagle is King of the Birds
Another Story of why the Eagle is King
Why the Wren's Feathers look Scorched
Why the Crow is Black
Tales of the Crow
Why the Crow Hates the Hawk
Why the Sparrow Stutters
Tales of the Owl
Why the Birds Hate the Owl
Why the Robin brings the Spring
Why Europe Loves the Robin
Why the Heron's Neck is Bent
Why the Peewit Cries "Peet, Peet"
Tales of the Woodpecker
Why the Woodpecker has a Long Beak
Why the Woodpecker likes Trees
How the Partridge got his Whistle
Why the Finch's Feathers are Ruffled
Why the Nightingale has many Songs but the Dove only says "Coo"
How the Kingfisher came to be
How the Kingfisher got its Color
How the Kingfisher got his Bill
Why the Hawk's Legs are Thin
Why Hawks Eat Snakes
Why the Magpie Chatters
Why the Magpie Builds a Poor Nest
How the Swallow came to be
Why the Swallow is Loved in Europe
The Navaho Story of the Swallow
How the Peacock got its Beautiful Tail
Why the Peacock's Tail is Spotted
Why the Pelican has a Pouch
Why the Thrush Hides in a Tree
The Animals and Birds Play Ball
Why the Turkey Gobbles
How the Turkey got his Beard
How the Red Bird got his Color
Why the Petrel lays its Eggs on Land
Why Swamp-Robin Foretells Rain
How the Emu lost his Wings
How a Bird made the World
Why the Birds go South in Winter
How the Thunder Bird scared the Turtle
Why Rabbit Cries when he can Run no Farther
How Rabbit Lost his Tail
Why the Rabbit Eats his Fur when he is Starving
How the Deer got his Horns
Why the Deer's Teeth are Blunt
Why the Mink is Black
Why the Possum's Tail is Bare
Why the Wildcat has a Wrinkled Face
Why the Woodchuck's Tail is Short
How the Flying Squirrel got its Wings
Why the Coyote lives on the Prairie
Why Coyotes are Hungry
Why Cats and Dogs Fight
Why Dogs have Long Tongues
Why the Goat's Knees are Bare
Why we find Frogs in Lakes and Streams
Why the Mosquito says Zum, Zzzz, Zzz
Why the Mosquito lives in Swampy Place
Why the Wombat lives in the Ground
How the Water Spider brought the Fire
Why there are no Tigers in Japan
Why Tigers Eat Raw Meat
