A Abdomen Aestivation Amplexus Antenna Antlers Aquatic Arboreal Articulation Asexual Reproduction Atrium B Baleen Barbel Beak Bilateral Symmetry Binocular Vision Biome Biped Blowhole Breaching Brood Parasite Browsing C Caecum Calcareous Camouflage Canine Tooth Carapace Carnassial Tooth Carnivore Carrion Cartilage Casque Caudal Cellulose Cephalothorax Cercus Chaeta Chelicera Chordate Chrysalis Class Cloaca Cloven Hoof Cocoon Colony Commensalism Compound Eye Cornicle Costal Covert Cremaster Crepuscular Critically Endangered D Data Deficient Delayed Implantation Deposit Feeder Detritivore Dewlap Diastema Digit Digitigrade Diurnal Domesticated Dorsal Dorsal Fin Drey E Echolocation Eclipse Plumage Ectoparasite Ectothermic Ecosystem Elytron Embryo Endangered Endoparasite Endoskeleton Endothermic Epiphyte Eversible Exoskeleton External Fertilization Extinct Extinct in the Wild F Family Femur Feral Fertilization Filter Feeder Flagellum Flehmen Response Flight Feathers Flipper Fluke Foetus Food Chain Food Web Form Fossa Fossorial Frugivore Furcula G Gall Genus Gestation Period Gill Grazing Guard Hair H Halteres Heat Pits Herbivore Hermaphrodite Hibernation Home Range Horn Host I Incisor Tooth Incubation Insectivore Internal Fertilization Introduced Species Invertebrate Irruption J Jacobson's Organ K Keel Keratin Kingdom Kleptoparasitism L Larva Lateral Line System Least Concern Lek Lophophore M Mandible Mantle Mantle Cavity Medusa Melon Metabolic Rate Metabolism Metacarpal Metamorphosis Metatarsal Metathorax Migration Mimicry Molar Tooth Monogamous Morph Moult
N Near Threatened Neurotoxin New World Niche Nictitating Membrane Nocturnal Notochord Nuchal Crest Nymph O Ocellus Old World Omnivore Ootheca Operculum Opposable Order Organ Ossicle Oviparous Ovipositor Ovoviviparous P Papilla Parapodium Parasite Parasitoid Parotoid Gland Parthenogenesis Partial Migrant Patagium Pectoral Fin Pectoral Girdle Pedipalps Pelvic Fins Pelvic Girdle Pelvic Spurs Pheromone Photosynthesis Phylum Pinna Piscivore Placenta Plankton Plantigrade Plastron Plumage Polygamous Polygynous Polymorphic Polyp Predator Prehensile Premolar Tooth Prepupa Prey Proboscis Pronotum Prothorax Pterostigma Pulmonate Pupa Q Quadruped R Radial Symmetry Radicivore Radula Rostrum Ruminant Rut S Scape Scolex Scute Scutellum Sebaceous Gland Sedentary Sequential Hermaphrodite Sessile Sexual Dimorphism Sexual Reproduction Silk Simple Eye Species Spermatophore Spicule Spinneret Spiracle Sternum Stridulate Subclass Subfamily Suborder Subspecies Suspension Feeder Swim Bladder Symbiosis T Tarsus Tegmen Terrestrial Territory Test Thorax Tibia Tissue Timbal Torpor Trachea Tracheal Lung Tracheal System Tubercle Tusk Tympanum U Underfur Unguligrade Uterus V Ventral Vertebrate Vestigial Viviparous Vulnerable W Warning Colouration Water Vascular System Weaning X Xylophagous Y Z Zooid Zygote
