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.
If you are looking to attract hummingbirds and butterflies to plants around your home, keep in mind that they feed on nectar-producing plants such as butterfly bushes, sedum, honeysuckle bushes, verbena, and bee balm. Hummingbirds especially like bright-colored plants.