Animals

Anatinae

Anatinae — the dabbling ducks subfamily

Anchiceratops

Anchiornis

Anchiornis — small feathered dinosaur from the Late Jurassic

Anchisaurus

Anchovy

Anchovy (Engraulidae): biology, uses, and ecological role

Andean condor

Andinophryne

Andrewsarchus

Andy Panda

Angelshark

Angelshark (Squatina): morphology, behavior, habitat and conservation

Anglerfish

Anglerfish (order Lophiiformes)

Angloposeidon

Angloposeidon: large Early Cretaceous sauropod from the Isle of Wight

Angola colobus

Angola colobus (Colobus angolensis)

Angolan African dormouse

Anguidae

Anguidae — the anguid lizards (glass lizards, alligator lizards, slowworms)

Anguis

Anguis — slowworms (legless lizards)

Anguis fragilis

Angus cattle

Angus cattle (Black Angus / Aberdeen Angus)

Anhanguera

Anhanguera — tooth‑crested pterosaur from the Cretaceous

Animal

Animal husbandry

Animal husbandry: care, breeding and management of domesticated animals

Animal Jam

Animal Jam: an overview of the children's virtual world

Animal trapping

Animals (Pink Floyd album)

Animals of New Zealand

Ankylopollexia

Ankylopollexia — the thumb‑spiked ornithopod dinosaurs

Ankylosauria

Ankylosauria: the armored, herbivorous dinosaurs with bony plates and tail clubs

Ankylosauridae

Ankylosauridae — armored, tail‑club dinosaurs of the Cretaceous

Ankylosaurus

Anna's hummingbird

Anomalocaris

Anomalocaris: a Cambrian apex predator

Anopheles

Anseriformes

Anseriformes: waterfowl, screamers and related birds

Ansonia (frog)

Ansonia (stream toads)

Ant

Ant (Formicidae): biology, behavior, and ecological role

Antarctic krill

Antarctic krill (Euphausia superba): biology, ecology, and human relevance

Antbird

Antbirds (Thamnophilidae): Neotropical insectivores and army-ant followers

Anteater

Anteater (Vermilingua)

Antelope

Antelope: overview, characteristics, distribution, and relationship with humans

Antiarchi

Antilopine kangaroo

Antilopine kangaroo (Macropus antilopinus)

Antlers

Antlers: structure, growth cycle, functions and distinctions

Antlion

Anura

Anura: frogs and toads — biology, diversity, and conservation

Anurognathus

Anurognathus — small insectivorous pterosaur of the Late Jurassic

Anzu wyliei

Apatosaurus

Apatosaurus — Large sauropod of the Late Jurassic

Ape

Ape: biology, classification, behavior and conservation