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.
Thus each of our hummingbirds is consuming .46 oz of nectar per day. There are 64 oz in our half gallon of daily solution, so if we divide 64 (the number of ounces consumed) by .46 (the per-hummingbird daily consumption), we get 139 hummers at your feeders. Wow!