Kaluga Sturgeon
Giant hunter of the Amur
Conservation Threats
Natural System Modification
Altered fire regimes, water management, and ecosystem engineering
1,334
Animals
49/56
Page
Natural System Modification Animals
Dimetrodon
Permian sailback-before dinosaurs
Haikouichthys
A tiny fossil at vertebrates' dawn
Ornithocheirus
Bird-hand ruler of Cretaceous skies
Purussaurus
Miocene mega-caiman of South America
Lystrosaurus
The beaked survivor of Earth's worst crisis
Scutosaurus
Permian armor, plant-powered
Wiwaxia
Spiny armor from the Cambrian seafloor
Palaeoloxodon namadicus
The giant straight-tusked titan of Ice-Age India
Barylambda
Heavyweight of the Paleocene
Hatzegopteryx
Hateg's giant sky-stalker
Helicoprion
Permian seas' spiral-toothed slicer
Xiphactinus
Not a dinosaur-Cretaceous sea predator
Crayfish
Claws that shape freshwater worlds
Feather Star
Feathery arms, drifting meals
Opaleye (Rudderfish)
The kelp-forest fish with an opal eye
Snailfish
Snailfishes: clingers of the cold deep
Ozark Bass
The Ozarks' star-spotted rock bass
Nutria
Orange teeth, big impact on wetlands
Orinoco Crocodile
Orinoco's long-snouted river giant
Nabarlek
Small wallaby, big cliff skills.
Ember Tetra
A living ember for nano tanks
Oregon Spotted Frog
Warm-shallow wetland specialist of the PNW
Owl Butterfly
Big wings. Bold eyes. Dusk flyers.