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.
1 Hummingbirds need to eat on average 7 times per hour for about 30-60 seconds. 2  A hummingbird can eat anywhere from half (1/2) to eight (8) times its body weight a day. 3  A hummingbird will visit an average of 1,000 flowers per day for nectar.