If your hummingbirds seem unusually tired or inactive, it could be a sign of illness. Ensure they have access to fresh nectar and clean feeders to maintain energy.

Dirty or matted feathers can indicate poor health. Regularly clean your feeders and ensure the birds have a clean environment to prevent feather-related issues.

Changes in behavior, such as excessive aggression or withdrawal, may signal health problems. Monitor their actions closely for any unusual patterns.

Cloudy or swollen eyes are signs of potential infections. Observe their eyes regularly and consult a specialist if you notice any abnormalities.

Changes in how much or how often hummingbirds feed can be a symptom of illness. Make sure nectar is always available and observe their feeding patterns.

Moldy feeders can cause respiratory problems. Regularly clean and sanitize feeders to avoid mold contamination and ensure a safe feeding environment.

Hummingbirds' aerodynamic efficiency is a result of their unique flight mechanics. Their ability to hover and maneuver is a marvel of natural engineering and evolution.