Yes, you can use a sun shelter for outdoor bird-watching or wildlife observation. Sun shelters provide shade and protection from the sun, making it more comfortable to spend extended periods of time outdoors. By setting up a sun shelter, you can create a designated area where you can observe birds or wildlife without being directly exposed to the sun's rays. This can be especially beneficial during hot summer months when the sun can be intense. Additionally, having a sun shelter can also provide some privacy and reduce the chances of scaring away birds or animals that may be more hesitant to approach if they feel exposed. Overall, using a sun shelter for outdoor bird-watching or wildlife observation can enhance your experience by providing a comfortable and protected space to observe and appreciate nature.