Phorusrhacos
Miocene runner with a can-opener beak
Conservation Threats
Natural System Modification
Altered fire regimes, water management, and ecosystem engineering
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Animals
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Natural System Modification Animals
Arctotherium
Short-faced giants of Ice Age South America
Terror Bird
Run fast. Strike hard. Terror bird.
Spinosaurus
Sail-backed hunter of ancient rivers
Tylosaurus
Ram-snouted ruler of Cretaceous seas
Plesiosaur
Four flippers, many lifestyles
Megatherium
The Great Beast of the Ice Age
Leedsichthys
Jurassic seas' gentle giant filter-feeder
Suchomimus
Croc-snouted hunter of Cretaceous Niger
Patagotitan
Patagonia's colossal long-neck
Blue-Gray Gnatcatcher
Tail-flicking, gnat-grabbing dynamo
Gomphotherium
Four tusks, many worlds, one lineage
Canada Warbler
The necklace warbler of the boreal
Red Kite
Forked tail, floating flight, comeback!
Daeodon
Not a pig-just terrifying teeth.
Troodon
Famous, brainy, and taxonomically tricky
Amargasaurus
Two spines, one Patagonian icon
Elasmotherium
The steppe rhino behind unicorn lore
Pelagornis
Giants of the wind-swept seas
Mosasaurus
Apex lizard of the Cretaceous seas
Hyaenodon
Hyena-toothed hunters of deep time
Brontosaurus
Thunder lizard, science icon
Tyrannosaurus Rex
Late Cretaceous king of crushing bites
Brachiosaurus
The high-shouldered sky-browsing sauropod