Hummingbirds have the fastest heart rate of any bird, beating up to 1,200 times per minute while hovering.
Their tiny size is complemented by wings that can beat up to 80 times per second for rapid, agile flight.
With a high metabolism, they consume up to twice their body weight in nectar daily to fuel their energy needs.
Their long, specialized tongues can extend up to 1.5 times the length of their beak to reach nectar deep within flowers.
Hummingbirds have excellent vision, able to see ultraviolet light and detect subtle color differences that help them find food.
Their unique skeletal structure includes a ball-and-socket joint at the shoulder, allowing them to rotate their wings in a full circle.
To conserve energy, they enter a hibernation-like state called torpor during the night, slowing their metabolic rate significantly.