Insects:
* Bees: Useful for pollination and honey production, but harmful when they sting.
* Mosquitoes: Harmful as carriers of diseases like malaria and dengue fever, but useful as a food source for other animals and for some scientific research.
* Ants: Useful for controlling pests and aerating soil, but harmful when they infest homes or bite.
* Termites: Harmful when they damage wooden structures, but useful for decomposing wood and providing a food source for other animals.
Mammals:
* Wolves: Useful for controlling prey populations and maintaining ecosystem balance, but harmful when they attack livestock or humans.
* Coyotes: Useful for controlling rodents and other small animals, but harmful when they attack pets or livestock.
* Rats: Harmful when they spread diseases and contaminate food, but useful in scientific research and as food for other animals.
* Bats: Useful for insect control and pollination, but harmful when they carry rabies or roost in buildings.
Other Animals:
* Sharks: Useful for maintaining marine ecosystems and attracting tourists, but harmful when they attack humans.
* Snakes: Useful for controlling rodent populations and producing antivenom, but harmful when they bite.
* Spiders: Useful for catching insects, but harmful when they bite.
Considerations:
* Human Impact: Humans often influence the balance between an animal's beneficial and harmful aspects. For example, habitat destruction can force animals to seek food in human settlements, leading to conflict.
* Perspective: What is harmful to one person or group might be beneficial to another. For example, a farmer might consider a wolf harmful, while an ecologist might consider it useful.
It's important to remember that animals are essential parts of the ecosystem. Even animals that are considered harmful often play important roles. Understanding the benefits and drawbacks of each species helps us make informed decisions about how to co-exist with them.