Caterpillars

General Info:

Caterpillars are the larval form of members of the order Lepidoptera (the insect order comprising butterflies and moths). Caterpillars are voracious feeders and many of them are considered to be pests in agriculture. Many moth species are better known in their caterpillar stages because of the damage they cause to fruits and other agricultural produce.

Physique:

Many caterpillars are cryptically colored and resemble the plants on which they feed. They may even have parts that mimic plant parts such as thorns. Their size varies from as little as 1 mm to about 75 millimetres (3.0 in). Some look like objects in the environment such as bird droppings.

Diet:

They are mostly herbivorous in food habit, although some species are insectivorous. Caterpillars have been called "eating machines", and eat leaves voraciously.

Distribution:

Caterpillars are found all over the world and in all types of environments: hot and cold, dry and moist, at sea level and high in the mountains. Most caterpillars species, however, are found in tropical areas, especially tropical rainforests. 

Cat

General Info:

The domestic cat is a small, usually furry, domesticated, and carnivorous mammal. It is often called the housecat when kept as an indoor pet or simply the cat when there is no need to distinguish it from other felids and felines. Cats are often valued by humans for companionship and their ability to hunt vermin and household pests.

Cat senses fit a crepuscular and predatory ecological niche. Cats can hear sounds too faint or too high in frequency for human ears, such as those made by mice and other small game. They can see in near darkness. Like most other mammals, cats have poorer color vision and a better sense of smell than humans.

Physique:

Domestic cats are similar in size to the other members of the genus Felis, typically weighing between 4–5 kg (8.8–11 lb). However, some breeds, such as the Maine Coon, can occasionally exceed 11 kg (25 lb). Conversely, very small cats (less than 1.8 kg (4.0 lb)) have been reported. The world record for the largest cat is 21.3 kg (47 lb). The smallest adult cat ever officially recorded weighed around 1.36 kg (3.0 lb). Feral cats tend to be lighter as they have more limited access to food than house cats. In the Boston area, the average feral adult male will scale 3.9 kg (8.6 lb) and average feral female 3.3 kg (7.3 lb). Cats average about 23–25 cm (9–10 in) in height and 46 cm (18.1 in) in head/body length (males being larger than females), with tails averaging 30 cm (11.8 in) in length.

Diet:

Cats hunt small prey, primarily birds and rodents, and are often used as a form of pest control. Domestic cats select food based on its temperature, smell and texture, strongly disliking chilled foods and responding most strongly to moist foods rich in amino acids, which are similar to meat.

Distribution:

A genetic study in 2007 revealed that domestic cats are descended from African wildcats 8000 BC, in the Middle East. According to Scientific American, cats are the most popular pet in the world, and are now found almost every place where people live.