They linger in the flowers for a long time, sometimes flying and sometimes "grounded". Image source: Visual China
Wildlife photographers photographed these adorable hummingbirds in Costa Rica. Image source: Visual China
They are small and able to hover in the air by flapping their wings quickly (15 to 80 times per second, depending on their size). Image source: Visual China
It is also the only bird that can fly backwards. Image source: Visual China
They suck nectar from blooming flowers for food. Image source: Visual China