- Pacific Banana Slug
- Pacific Black Duck
- Pacific chorus frog
- Pacific Forktail
- Pacific Golden-Plover
- Pacific Gull
- Pacific Hairy Hermit Crab
- Pacific Oyster
- Pacific Purple Sea Urchin
- Pacific Reef Heron
- Pacific Rock Crab
- Pacific Sand Crab
- Pacific Sideband
- Pacific Swallow
- Pacific Wren
- Paddy Field Frog
- Painted Anemone
- Painted Bunting
- Painted Comber
- Painted Lady
- Painted Lichen Moth
- Painted Stork
- Painted Turtle
- Palamedes Swallowtail
- Pale Beauty
- Pale Grass Blue
- Pale Green Assassin Bug
- Pale Oak Beauty
- Pale Shoulder
- Pale Swallowtail
- Pale Tussock Moth
- Pale-breasted Thrush
- Pallas' Squirrel
- Pallid-winged Grasshopper
- Palm Tanager
- Palm Warbler
- Palmate Newt
- Pandorus Sphinx
- Pantropical Huntsman Spider
- Pantropical Jumping Spider
- Paradise Shelduck
- Parent Bug
- Passionvine hopper
- Pea Blue
- Peach Blossom Moth
- Peacock Pansy
- Pearl Crescent
- Pearl Veneer
- Pearl-bordered Fritillary
- Pearly Heath
- Pearly Wood-nymph
- Peck's Skipper
- Pectoral Sandpiper
- Pelagic Cormorant
- Pellucid Hover Fly
- Peppered Moth
- Peregrine Falcon
- Perplexing Bumble Bee
- Peters's Rock Agama
- Phainopepla
- Phaon Crescent
- Pharaoh Cicada
- Picazuro Pigeon
- Pickerel Frog
- Picuí Ground Dove
- Pied Avocet
- Pied Butcherbird
- Pied Cormorant
- Pied Crow
- Pied Currawong
- Pied Kingfisher
- Pied Oystercatcher
- Pied Paddy Skimmer
- Pied Stilt
- Pied-billed Grebe
- Pigeon Guillemot
- Pileated Woodpecker
- Pin-tailed Whydah
- Pine Grosbeak
- Pine Hawkmoth
- Pine Ladybird
- Pine Processionary-moth
- Pine Siskin
- Pine tree Spur-throat Grasshopper
- Pine Warbler
- Pinfish
- Pink-barred Pseudeustrotia Moth
- Pink-necked Green-Pigeon
- Pink-spotted Hawkmoth
- Pioneer White
- Pipevine Swallowtail
- Plain Chachalaca
- Plain Prinia
- Plain Tiger Butterfly
- Plain-bellied Watersnake
- Plains Cupid
- Plains Garter Snake
- Plantain moth
- Plantain Squirrel
- Plateau Fence Lizard
- Poison Ivy Leaf Mite
- Police Car Moth
- Polished Lady Beetle
- Polydamas Swallowtail
- Polyphemus Moth
- Pond Slider
- Poplar Hawkmoth
- Poplar Leaf Beetle
- Porcelain Gray
- Portland Ribbon Wave
- Portuguese Man o' War
- Portuguese Millipede
- Potato Mirid
- Powdered Dancer
- Prairie Lizard
- Prairie Warbler
- Prince Baskettail
- Privet Hawkmoth
- Promethea Silkmoth
- Pronghorn
- Prothonotary Warbler
- Psyche
- Ptenothrix maculosa
- Pumpkinseed
- Punctured Tiger Beetle
- Pure Green Sweat bee
- Purple Emperor
- Purple Finch
- Purple Gallinule
- Purple Heron
- Purple Martin
- Purple Sandpiper
- Purple Shore Crab
- Purple Sunbird
- Purplish Copper
- Putnam's Jumping Spider
- Pygmy Cormorant
- Pygmy Nuthatch
- Pyrrhuloxia