One of the most frequent mistakes I’ve seen with wildlife photography is photographers who get too close to the subject. Often times their lens is not long enough to get a good image so they try to make up for it by moving too close to the animal, which in turn often spooks the animal into running off or birds flying away. Some of this photographer behavior borders on the line of harassment. There are few set guidelines for proper distance, but always error in the favor of the animal. If the animal is looking at you intently, he is probably wary and ready to bolt. If your proximity causes the animal to take flight, you got too close. This is very important for animals feeding. I’ve seen careless photographers spook an entire flock of geese by moving in too close. The birds exhibited signs of distress, but the well-meaning photographer kept moving closer. All animals, especially migrating birds, need to feed to refuel for their long treks. Scaring them off a feeding or resting ground is a great disservice to them. Likes always appreciated.