Oh, the second post isn't a list; I'm just giving examples of animals that would be included in the above groups. Otters and Martins are both going in, and would both be located under "Mammal > Ermine", since they're both weasel-like. They're some of my favorite animals, so they're sure as heck going in.
Anywho, to kick things off, here are a handful of archetypal Felines:
Housecat:Size: 4 to 6 kg
Lifespan: 10-20 years
Litter Size: 3-6 kittens
Climate: Temperate Savannah and Woodland
A small, domesticated carnivorous mammal, valued for its companionship and ability to hunt vermin. Their fur comes in a wide variety of colors and patterns. When wild, they are primarily nocturnal, and live in temperate grasslands and forests.
Traits: Domestic, Vermin Hunter, Claws, Bite
Wildcat:Size: 5 to 7 kg
Lifespan: 8-16 years
Litter Size: 3-6 kittens
Climate: Temperate Steppe, Savannah, and Bushland.
A small, carnivorous mammal which preys on smaller animals. They are solitary, nocturnal ambush predators. Their fur ranges from pale yellow to medium brown, with black markings and light grey underparts.
Traits: Vermin Hunter, Claws, Bite
Manul:Size: 3 to 5 kg
Lifespan: 8-16 years
Litter Size: 3-6 kittens
Climate: Cold Badland, Rocky Desert, and Steppe
A small carnivorous feline, with round ears, stocky bodies, long tails, and a short face. Their long, dense fur gives them a stout, plushy appearance. They are solitary, crepuscular ambush hunters, and hunt smaller animals. Their coloration ranges from ochre to grey, with black markings and light grey underparts.
Traits: Vermin Hunter, Claws, Bite, Cold-Tolerant
Lynx:Size: 20 to 30 kg
Lifespan: 15-25 years
Litter Size: 1-4 kittens
Climate: Temperate and Cold Boreal Forest, Montane Forest, and Steppe
A medium predatory feline with tufted ears, broad paws, a ruffed face, and a short tail. They are primarily solitary, nocturnal hunters, but occasionally hunt in small groups. Their fur ranges from golden brown to beige-white with white underparts, and are sometimes marked with dark spots.
Traits: Predator, Claws, Bite, Cold-Tolerant