1: Hummingbird hearts beat up to 1,260 times per minute.

2: Their hearts can expand and contract rapidly.

3: Hummingbirds have the largest heart-to-body ratio of any animal.

4: Their hearts are essential for their high-energy lifestyle.

5: Hummingbirds rely on their hearts to fuel their fast flying.

6: Their heart rate can increase during flight and decrease at rest.

7: Understanding hummingbird physiology helps with conservation efforts.

8: Their unique hearts are a marvel of nature.

9: Studying hummingbird hearts can lead to medical advancements.