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- aestivation
- altricial
- amensalism
- animalia
- antenna
- antler
- antlers
- arboreal
- asexual
- baleen
- browse
- browsing
- brumation
- carnivore
- carnivores
- carnivorous
- cartilage
- cathemeral
- cecotrope
- cecotropes
- chelicerae
- commensalism
- competition
- coprophagy
- crepuscular
- delayed implantation
- detritivore
- detritivores
- detrivore
- detrivores
- diapause
- diurnal
- ectothermic
- endothermic
- fledging
- fledgling
- folivore
- folivores
- folivorous
- fossorial
- frugivore
- frugivores
- frugivorous
- gestation
- graminivore
- graminivores
- graminivorous
- granivore
- granivores
- granivorous
- gravid
- herbivore
- herbivores
- herbivorous
- hereditary
- heredity
- hibernation
- insectivore
- insectivores
- insectivorous
- invertebrate
- invertebrates
- kleptoparasite
- kleptoparasitism
- mammal
- mammals
- matutinal
- mutualism
- neutralism
- nidicolous
- nocturnal
- omnivore
- omnivores
- omnivorous
- parasite
- parasitic
- parasitism
- parthenogenesis
- passerine
- permeability
- permeable
- piscivore
- piscivores
- piscivorous
- precocial
- predation
- predation
- predator
- predators
- terrestrial
- torpor
- traditional medicine
- vertebra
- vertebral
- vertebrate
- vespertine
- zoology