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Species knowledge and animal classification

Mammals, birds, reptiles, amphibians and fish

You cannot care for an animal well without knowing what kind of animal it is. Different animal groups have vastly different requirements for heat, moisture, light, and feed, and what is right for one animal can be directly harmful to another.

§The large animal groups

GroupCharacteristicExamples
MammalsHardback feeds live young suckles offspringHorses, rabbits, apes, rodents
BirdsFeathers beak lays eggs regulates own body temperaturePaper
ReptilesScales, usually lay eggs, warm up from outsideHoses, snakes, turtles
PaddingDamp skin, lives often in both water and landFrogs, salamanders
FishLives in water, has gills, warms up from outsideAquarium fish, goldfish

§Variable-temperature and constant-temperature animals

A crucial difference is whether the animal regulates its own body temperature. Mammals and birds are warm-blooded (endothermic) and maintain a stable body temperature from within. Reptiles, amphibians and fish are cold-blooded (ectothermic) and depend on the environment to get warm enough to function.

§Adapt the environment to the species

  • 01Temperature and humidity must match the animal's natural habitat.
  • 02Light and circadian rhythm affect behaviour, breeding and wellbeing.
  • 03Aquatic and moisture-loving species require control of water quality and humidity.
  • 04Social structure varies — some species live in herds, others are loners.

§Why classification is useful

When you know the animal's group and natural habitat you can conclude much about its needs even for species you don't know beforehand. It lets you look things up correctly ask the right questions and avoid mistakes that cost the animal its health.

If you know the animal's original habitat, you know half of its care.