Causes and symptoms. Fatigue may be the result of one or more environmental causes such as inadequate rest, improper diet, work and home stressors, or poor physical conditioning, or one symptom of a chronic medical condition or disease process in the body.
1 A hummingbird will use its tongue to lap up nectar from flowers and feeders. 2  A hummingbird's tongue is grooved like the shape of a W. 3  Hummingbirds have tiny hairs on the tip of the tongue to help lap up nectar.
So leaving your feeder up longer at the end of the season will not cause them to hang around longer than they should, it wonât affect the hummingbird migration at all. Now you should have a good idea of when to take down your hummingbird feed/hummingbird feeder and when to stop feeding hummingbirds. Here is a link to find out how to make hummingbird feedâ¦..hummingbird feed recipe. Homemade hummingbird nectar is the best hummingbird food.