Use groups to browse
Start here when you know the broad kind of animal you want to explore.
Taxonomy directory
Browse Animals by Group
Move through SpeciesTraits by major animal class. This page is a navigation hub for taxonomy; individual species profiles provide life-history measurements and natural-history context.
Major classes
Animal groups
Counts reflect available species profiles currently assigned to each class.
Mammalia
Mammals
Warm-blooded vertebrates with hair or fur.
76 species profiles
Aves
Birds
Feathered vertebrates with beaks and wings.
29 species profiles
Reptilia
Reptiles
Scaled vertebrates with diverse reproductive strategies.
20 species profiles
Amphibia
Amphibians
Vertebrates whose life cycles often bridge water and land.
2 species profiles
F
Actinopterygii
Ray-finned Fish
The largest living class of bony fishes.
No profiles available yet
Insecta
Insects
Six-legged invertebrates with highly varied life histories.
1 species profileWays to explore
Groups organize; traits compare
Use profiles for species facts
Each species page contains its own measurements, evidence record, and natural-history context.
Use the Explorer to compare
The Animal Life Explorer is the dedicated tool for comparing the same trait across multiple species.