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.
They eat orange nectar and also apple slices and orange slices. As an aside, I was watching my hummingbird feeder this morning -- and watched an Oriole kill and eat a hummingbird. She grabbed the little bird and then perched on a limb and proceeded to eat the head and chest. When finished, she dropped the tail portion to the ground.