Gas giant
The smallest known extrasolar planet that is likely a "gas planet" is Kepler-138d, which has the same mass as Earth but is 60% larger and therefore has a density that indicates a thick gas envelope.
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.