Critter (noun)

A creature, especially an animal, often used informally or affectionately.

Origin:

The word "critter" is believed to have originated from the american english colloquialism of the 19th century. the word is derived from the words "creature" or "animal".

Examples:

1. The little critter scurried across the floor.
2. The kids loved to watch the critters in the zoo.
3. The critter was so cute, I couldn't help but take a picture.
4. The critter had been injured, so we took it to the vet.
5. The critter was hard to catch, it was very fast.