While there are some wildlife species along the Annapurna Circuit trek, encounters with dangerous animals are rare. The region is home to various animals, including langur monkeys, Himalayan tahr, and some bird species. In terms of insects, there may be leeches during the monsoon season, but they are not considered dangerous. It is advisable to take necessary precautions, such as wearing appropriate clothing and using insect repellent, to minimize the chances of any discomfort from insects or animals.