Ants are eusocial insects of the family Formicidae and, along with the related wasp and beess, more than 13,800 of an estimated total of 22,000 species have been classified. Ants are the most common pest to enter the homes and business, and become a enoying pest. They enter the structure through cracks and crevices. 

Cockroaches are insects belonging to the order blattodea. About 30 cockroaches species out of 4600 are associated with human habitats. Some species are well-known pests.

A mouse is a small rodent. Characteristically, mice are known to have a pointed snout, small rounded ears, a body-lenght scaly tail, and high breeding rate. the most common mouse is the House Mouse.

The brown rat, also known as the sewer rat, Norway rat, one of the largest muriods. It is a brown or grey rodent with a body lenght of up to 28 cm long, and a tail slightly shorter then that.

Wasp, any member of a group of insects in the order hymenoptera, suborder Apocrita, some of which are stinging. Wasp are distinguished from the ants and bees of Apocrita by various behavioral and physical characteristics, particulary thier slender, smooth body and legs with few hairs.

Hornets are the largest of the eusocial wasps, and are similar in appearance to yellowjackets, their close relatives. Some species can reach up to 5.5 cm in lenght. They are distinguished from other vespine wasp wasps by the relatively large top margin of the head.

Occasional invaders are insects and other arthropods that sporadically enter structures, sometimes in large numbers. 

Spiders are air-breathing arthropods that have eight limbs, chelicerae with fangs generally able to inject venom, and spinnerets that extrude silk. They are the largest order of arachnids and rank seventh in total species diversity among all orders of organisms.