Planet
The smallest known planet is PSR B1257+12A, one of the first extrasolar planets discovered, which was found in 1992 in orbit around a pulsar. Its mass is roughly half that of the planet Mercury. The smallest known planet orbiting a main-sequence star other than the Sun is Kepler-37b, with a mass (and radius) slightly higher than that of the Moon.
Little bronze cuckoo
The little bronze cuckoo ("Chrysococcyx minutillus") is a species of cuckoo in the family Cuculidae. It is found in Southeast Asia, New Guinea and northern and eastern Australia. Its natural habitat is subtropical or tropical moist lowland forests. This is the world's smallest cuckoo, at 17 grams and . The subspecies "rufomerus" and "crassirostris" are sometimes given specific status.