- proboscis-monkey
- procrypsis
- procryptic
- proepimeron
- proestrum
- presternum
- pricket
- proala
- proboscidea
- proboscidean
- procellaria
- procellarian
- procoelous
- promerops
- proglottis
- prosimian
- propterygium
- prosobranch
- protozoa
- protractile
- prowfish
- psammophilous
- pseudobranch
- pseudochrysalis
- psyche
- ptarmigan
- pterodactyl
- pteropod
- pterosaur
- prosternum
- protopod
- pseudobrachium
- psittacus
- puff-adder
- puffin
- pug
- pulmonate
- puma
- pupal
- pursang
- pygal
- pupae
- pupate
- pur sang
- pure-blooded
- purebred
- pygidium
- quadrumane
- quadruped
- quagga
- quahaug
- quetzal
- pulvillar
- punctate
- pupa
- pupation
- puppet
- quadrimanous
- quadrupedal
- quagog
- queen-fish
- pygostyle
- python
- quadricornous
- quadrumanous
- quail
- quinquefarious
- quinque-dentate
- raccoon
- racer
- racoon
- rail
- rain-worm
- radula
- rangifer
- raptatory
- rattle-fish
- razor-bill
- razor-clam
- rainbird
- ralline
- rangiferoid
- ranidae
- rat
- raven
- ray
- rasorial
- rate-fish
- ratite
- rattle
- recurvirostral
- red deer
- redbreast
- redcap
- red-fish
- redbill
- redstart
- redwing
- recurved
- redshank