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.
Overview. Like hummingbirds, bees feed on nectar and are attracted to the sugar solution in hummingbird feeders. Bees drive hummers away, so it is important to make your feeder unattractive to bees while still keeping it easily accessible to hummingbirds.