Riverine

Emperor Goose

White-headed goose of the sea-ice edge

King Eider

Crown of the Arctic pack ice

Purple Gallinule

The lily-pad walker of the wetlands

Nightjar

Built for twilight insect-hunting

Roadrunner

The sprinting cuckoo of the desert

Fulvous Whistling Duck

Tawny flocks, whistled calls

European Goldfinch

Red mask, gold wing, thistle king.

Upland Sandpiper

Fencepost singer of the prairie

Rough-Legged Hawk

The feather-legged hover-hunter

Epicyon haydeni

Miocene muscle: the bone-crushing canid

Argentavis Magnificens

Miocene sky-giant of Argentina

Dromornis stirtoni

Australia's Miocene mega-bird

Supersaurus

Jurassic length, Morrison legend

Shantungosaurus

Shandong's colossal duck-bill grazer

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

Dickcissel

Prairie singer, South America traveler

Canvasback

Built for deep dives, born to roam

Veery

Spiral song, epic migration.