Mammals
Start with high-confidence mammals books, then narrow by subgenre or adjacent topics.
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More Mammals Books
Born Free
Sabertooths and the Ice Age
Giraffes
Are Wolves Afraid of the Dark?
Bears Are Best!
Hello, World! Arctic Animals
Grizzly Bears (nature's Children)
The Manatee Scientists
Polar Bear Vs. Grizzly Bear (who Would Win?)
Winter's Tail: How One Little Dolphin Learned to Swim Again
Rhino Vs. Hippo (who Would Win?)
What If You Had Animal Hair?
Ultimate Jungle Rumble (who Would Win?)
Reindeer
An Arctic Story
Walk With a Wolf
Hippos Are Huge!
Pigs
Elephants of Africa
The Ecological Buffalo
Alaska's Three Bears
Outdoor School: Animal Watching
The Whale Who Swam Through Time
Who Would Win?: Battle Royale
Fennec Fox or Arctic Fox (wild World: Hot and Cold Animals)
Desert Hare or Arctic Hare (wild World: Hot and Cold Animals)
A Colony of Rabbits (learn About: Animals)
Who Would Win?: Wild Warriors Bindup
Field Guide to Mammals of Europe, North Africa and the Middle East
Dolphins (national Geographic Kids Readers, Level 2)
Great Migrations Elephants (national Geographic Kids Readers, Level 3)