Freshwater

Puertasaurus

Patagonia's giant, known from fragments

Amphicoelias Fragillimus

The lost giant of the Morrison

Arambourgiania

A sky-giant with a giraffe-long neck

Theropod

From raptors to robins: all theropod

Argentinosaurus

Patagonia's almost-unfathomable giant

Ceratopsian

Beaks, frills, and horns: Ceratopsia!

Lesser Scaup

Peaked crown, big rafts, true diver

Canvasback

Built for deep dives, born to roam

Gadwall

The "quiet" duck with a bright wing flash

Common Goldeneye

Hear the whistler, spot the gold eye

Tundra Swan

Whistling wings, tundra to tidewater

Anhinga

Spears fish, then sun-dries in style

Snow Goose

Two morphs, one Arctic traveler

Ruddy Duck

Small duck, big tail attitude

Wood Duck

The tree-nesting duck with a leap

Black-Bellied Whistling Duck

The whistling "tree duck" with style

Northern Pintail

Pointed tail, planet-spanning migrant

Diprotodon

Pleistocene giant of Australia

Epidexipteryx

Display-feather dinosaur of Jurassic China

Gorgosaurus

Laramidia's long-legged tyrant

Hippopotamus gorgops

The high-eyed hippo of deep time

Magyarosaurus

A little titanosaur from an island world

Masiakasaurus

Madagascar's forward-toothed hunter

Cervalces latifrons (Broad-Fronted Moose)

The Pleistocene's broad-browed moose