Observations made during visits to Rarotonga in July and August 1976 are detailed, with particular reference to land birds and petrels, a group not previously recorded. The outstanding feature of the land bird ecology is the apparent total restriction of the native species except Long-tailed cuckoo to the central primitive forests and adjacent second growth. The native land bird fauna consists of only five species: Long-tailed Cuckoo, Pacific Pigeon, Rarotonga Fruit Dove, Rarotonga Flycatcher and the Rarotonga Starling, of which the last three are endemic.