Which bird can hover stationary in mid-air by rapid flapping of wings up to 80 times per second?

Hummingbird

What winged horse emerged from the blood of Medusa? What does a ringing bell on Halloween notify according to tradition? Which 20th-century law granted Native Americans citizenship in the United States? After rising from the dead, for how many days did Jesus appear to his disciples? Who said that Jesus must increase, and he himself must decrease?