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.
The Hummingbird Feeding Information (interesting hummingbird facts). They will feed 5 to 8 times every hour for 30 to 60 seconds at a time. The large portion of a hummingbirds diet is sugar which they get from flower nectar and tree sap. They also eat insects and pollen to get protein to build muscle.