88 of 112 people found the following review helpful
not up to Audubon standards,
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This review is from: Audubon Butterflies - A Field Guide to North American Butterflies (App)
A nice start but disappointing compaired to the N American bird guide. There are no pictures of the catepillars and no range maps nor good descriptions of seasonality.
The pictures are all excellent and point out the features for identification. Easy to use.