There’s a reason that Peterson is America’s Best-Selling Field Guide Series®! Sponsored by the National Wildlife Federation and the Roger Tory Peterson Institute, these guides are a boon to nature enthusiasts everywhere.

Now available in a mobile version, the official Peterson Field Guide to Mammals of North America app goes where you go.

Time-tested and uniquely useful, the Peterson Field Guides series has key features that set it apart from the competition.

▶ Roger Tory Peterson's exclusive system shows exactly what features to look for to tell one species from another.
▶ Designed to work in the field, every illustration and every word, is directed to that end.

▶ The most comprehensive, in-depth, and current guide to North American mammals. Includes extensive information on mammal behavior.
▶ Covers the more than 450 species of mammals found in North America north of Mexico, including those that live in near-shore waters.
▶ Includes vocalizations of more than 100 species of mammals.

▶ The only guide to include paintings and photographs of the animals and their tracks as well as photographs of mammal skulls.
▶ Includes full-color illustrations, black-and-white drawings, and detailed range maps.

▶ Swipe through page after page of illustrations grouped together by similarity so you can identify mammals faster.
▶ Not sure what you’re looking for? Browse species by mammal type or alphabetically and then toggle the display between animal groups, tracks and skulls.
▶ Looking for something specific? Search by species name, family, or mammal size, and refine your search by location, habitat, abundance, and mammal type.
▶ Make our app YOUR app — make custom lists of mammals via email or social media, add your own photos, share lists with friends, record your sightings, and maintain a life list.


Find us on Twitter — @petersonguides, and Facebook —


Have questions? email

What’s New

Version 1.2

Fix search issue
Update about

Ratings and Reviews

2.5 out of 5
8 Ratings
8 Ratings
Buck47Sound ,

Cannot find location!

I like the app however it gets hung up finding location all the time. This keeps the program from being useful, it won’t launch because it is finding location. Don’t waste your money on this until it is fixed. I wrote to the provider, they reply they need more information, no one else had a problem. Pitiful

Cackling Goose ,

Excellent field guide

This app has beautiful, accurate illustrations, descriptions, range maps, vocalizations, and a checklist. Superior to the 3 book field guides I own.

yinzer1234779 ,

Searching for location

I cannot use this site as it is always searching for a location. I am literally in the heart of Pittsburgh. This should not be a problem. I would love to be able to utilize this app during hikes, but if it can’t locate Pittsburgh, I don’t feel it would fare well on a hike.


gWhiz, LLC
287.1 MB
Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2016 Houghton Mifflin Harcourt


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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