The mouse mice (originally Greek muscle) in zoology refers to a small animal of mammal class and of rodent order. It is the most well-known and popular rodent in the world. Mice are activated especially at twilight and night, are omnivore and begin to seek their food as soon as darkness falls. They live in small male-dominated family groups. Sometimes males fight tremendously to secure their place in the team hierarchy. They live about two and a half years and are very fertile. Mice breed all year round and give birth 4 to 8 times a year from 7 to 10 mice. The little mice can reproduce as soon as they reach 2 months of age. Mice have many enemies, such as cats, snakes and owls. However, their most life-threatening enemy is human.

 The rat is a mammal that belongs to rodent order. It resembles the mouse, but it is distinguished by its larger size. It has a cylindrical body, short and thick nose, small ears, long tail, covered with small and sparse hairs. Rats give birth 6-8 times a year from 4 to 6 mice. The total number of species is calculated to 400, scattered throughout Europe, Asia and north America.

The ‘farm’ rats live in Macedonia and Epirus. They feed on plants and cause serious damages to crop, which is why humans ‘fight’ it by various means such as traps, poison baits, toxic sprays etc.

Ground-based rats are also known as rat amphibians, as they like to live near marshes. They mainly live in Macedonia and Thrace and feed on small animals and roots. Other species that exist in Greece are the Rat hypoxanthus that lives in Thessaly, Macedonia, Epirus and Thrace, the Snowy Rat that lives in central and northern Greece, the Mediterranean rat , found throughout mainland Greece and the rat the underground located in Macedonia, Thrace, Thessaly.