Bats!

(Right below the street light.) Too large to be an insect, too erratic a flier to be a bird, I finally have proof that bats live in Tokyo Bay.

According to a city report, the type of bat seen around here is called the Japanese House Bat. True to its name, it prefers to live where there are houses rather than forests. They have one to three pups in early summer.

Unfortunately, they never stop flying once the sun goes down, so it was virtually impossible to get a clear shot of the birds.