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.
Besides providing nectar-producing plants, you can offer nutrition from a hummingbird feeder. The standard hummingbird feeder recipe closely approximates flower nectar: 4 parts water 1 part sugar. To make food for hummingbirds, first mix the ingredients. Boil for two minutes to remove impurities in the sugar and water.