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.
Published May 20, 2009 |. A hummingbird will eat for the first time that day about a half hour before the sun comes up. The hummingbird will stop eating every day about a half hour after it is dark. It may surprise you to discover that a hummingbird will eat 25% of its daily food intake within the first hour of awakening.