Animals

Oxalaia

Oxalaia — a spinosaurid theropod from the Cretaceous of Brazil

Oxpecker

Oxpecker (Buphagidae): African birds that cling to large mammals

Oystercatcher

Oystercatcher: coastal shorebird with a specialized bill

Paa hazarensis

Paa hazarensis (Hazara frog)

Paa sternosignata

Paa sternosignata: a South-Central Asian river frog

Paa vicina

Paa vicina — a montane frog of India and Pakistan

Paca

Pacas (Genus Cuniculus): Distribution, Diet, and Human Interactions

Pachycephalosauria

Pachycephalosauria — the thick‑skulled marginocephalians

Pachycephalosaurus

Pachycephalosaurus: the dome-headed Late Cretaceous ornithischian

Pachypleurosaur

Pachyrhinosaurus

Pacific giant salamander

Pacific tree frog

Pacific tree frog (Pseudacris regilla): description, habits and distribution

Pack (canine)

Pack hunter

Pack rat

Packy (elephant)

Packy — notable Asian elephant at the Oregon Zoo

Paedophryne

Paedophryne — tiny leaf‑litter frogs of Papua New Guinea

Pakicetus

Pal

Palaeodictyoptera

Palaeognathae

Palaeognathae: paleognaths, the ratites and tinamous

Palaeothere

Palaeothere — extinct perissodactyl browsers of the Eocene–Oligocene

Paleothyris

Paleothyris: an early Pennsylvanian anapsid reptile

Palestine sunbird

Palestine Sunbird (Cinnyris osea): Identification, Range, and Ecology

Palfrey

Pallas's cat

Pallas's cat (Otocolobus manul)

Pallas's fish eagle

Pallas's Fish Eagle (Haliaeetus leucoryphus)

Palm cockatoo

Palm cockatoo (Probosciger aterrimus)

Palm-nut vulture

Palmchat

Palmchat (Dulus dominicus)

Palos Verdes blue

Palos Verdes blue (butterfly)

Panarthropoda

Pangolin

Panoplosaurus

Panphagia

Panther

Panthera

Pantropical spotted dolphin

Pantropical spotted dolphin (Stenella attenuata)

Papilioninae

Papilionoidea

Papillon (dog)

Paracanthurus

Paracanthurus — the palette (blue) tang genus

Paradise-crow

Paradise-crow (Lycocorax pyrrhopterus)

Parakeet

Parakeet — small long‑tailed parrots: overview, species, behavior and care

Paramylodon

Paramylodon — North American ground sloth of the Pliocene–Pleistocene

Paramylodon was a large mylodontid ground sloth that lived in North and Central America from the Pliocene to the end of the Pleistocene, notable for dermal ossicles and abundant fo

Parapuzosia

Parapuzosia — giant Cretaceous ammonite genus

Parasaurolophus

Parasaurolophus: the crested hadrosaur of Late Cretaceous North America