MCQ Detailed View

Hummingbirds are among the smallest birds in the world, but they are also famous for their extremely fast metabolism and high energy needs. One of the most remarkable features of a hummingbird is its heart rate, which is one of the fastest recorded among birds. On average, a hummingbird’s heart can beat more than 1200 times per minute.

This rapid heartbeat is directly linked to their active lifestyle. Hummingbirds flap their wings at an extraordinary speed, often between 50 to 80 times per second, which requires a tremendous amount of energy. To supply enough oxygen and nutrients to their flight muscles, their heart must pump blood at a very high rate.

The size of the hummingbird also influences its heart activity. Because they are very small, they lose body heat quickly and must maintain a very high metabolic rate to survive. Their high heart rate helps sustain their body temperature, muscle activity, and energy requirements during flight.

Interestingly, a hummingbird’s heart rate does not remain the same at all times. During rest or sleep, it slows down significantly, sometimes dropping below 500 beats per minute. This allows the bird to conserve energy during periods of inactivity. At night, many hummingbirds enter a state of torpor, which is similar to temporary hibernation, where both body temperature and heart rate are greatly reduced.

However, during flight, especially when hovering or flying rapidly to collect nectar, the heart rate can peak above 1200 beats per minute. This makes the hummingbird one of the most energy-demanding animals in the animal kingdom.

In summary, the average heart rate of a hummingbird is more than 1200 beats per minute, a fascinating adaptation that supports its unique way of life.