House Fly
House Fly is the most common insect that we get to see around us. They bring several types of diseases and germs but in reality they are very good dirt cleaners. They always carry away dirt and are one of the best unwanted helpers of human beings.
Vultures
This is a bird that is scavenger i.e. survives on flesh of dead animals. They are large birds with no feathers on their head or neck. They also help the human beings because they clean away dead bodies by eating them.
Crocodile
One of the fiercest animals in the world, crocodile is known to keep the atmosphere clean. They eat dead bodies and excreta of the other animals.
Beetles
Beetles are generally considered as useless insects but they are the most required insect for pollination. About 80% of flowers cannot germinate into flowers without beetles.
Lice
Lice live on our scalps and hair and sometimes live on the body too. They lay eggs on the hair. People having lice in the body suffer with itchy scalp. They can spread very easily through hairbrushes, clothing and other contacts. So they indirectly help us to remain clean and are our unwanted helpers of humans.
Crow
Crow may not be the bird to be kept as a pet but it is an unwanted helper because it eats away dirty things and carries dirt and converts the dirty things into fertilizer.
Lion
Lion is also an unwanted helper because it kills injured and ill animals who are suffering.
Mosquito
Mosquitoes are hated by the human beings because they spread many types of diseases and most of them are fatal. Mosquitoes spread diseases like malaria, dengue, Filaria , Encephelatis etc but they help us indirectly because they force human beings to keep the surrounding areas clean.
Snake
Snakes are one of the deadliest animal and many human beings die of snake bites but snakes help us get rid of plague by eating rats, a disease caused by rats.
Bugs
Bugs are our unwanted helpers because they force us to keep our sleeping areas clean so that they cannot breed.
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