Pecuk kecil yang seluruhnya hitam dengan mata hijau. Sering membentuk kawanan berjumlah besar, baik kala terbang maupun saat mencari makan di air. Jauh lebih kecil dari pecuk-padi besar, dan tidak memiliki wajah kuning/putih sebagaimana jenis itu. Melimpah di sepanjang pantai dan perairan pedalaman.
Exotic species flags differentiate locally introduced species from native species.
Naturalized: Exotic population is self-sustaining, breeding in the wild, persisting for many years, and not maintained through ongoing releases (including vagrants from Naturalized populations). These count in official eBird totals and, where applicable, have been accepted by regional bird records committee(s).
Provisional: Either: 1) member of exotic population that is breeding in the wild, self-propagating, and has persisted for multiple years, but not yet Naturalized; 2) rarity of uncertain provenance, with natural vagrancy or captive provenance both considered plausible. When applicable, eBird generally defers to bird records committees for records formally considered to be of "uncertain provenance". Provisional species count in official eBird totals.
Escapee: Exotic species known or suspected to be escaped or released, including those that have bred but don't yet fulfill the criteria for Provisional. Escapee exotics do not count in official eBird totals.