The best time to visit Arunachal Pradesh for wildlife viewing is during the winter months (October-February). The weather is cool and dry during this time, making it ideal for trekking and wildlife safaris. The animals are also more active during this time, as they are looking for food and water.
During the monsoon season (June-September), the weather is hot and humid, and there is a lot of rain. This can make it difficult to travel and see wildlife. However, some people enjoy the lush vegetation and the abundance of butterflies and other insects that are present during this time.
During the summer months (March-May), the weather is hot and dry. This can be a good time to visit if you are looking to avoid the crowds and the heat of the monsoon season. However, the animals are less active during this time, as they are trying to stay cool.
All year round, there are opportunities to see wildlife in Arunachal Pradesh. However, the best time to visit for wildlife viewing is during the winter months (October-February).