Identified with hilly terrain, Indian swiftlet makes a surprise move, visiting a ‘flat’ estuary in Chennai

The 2nd look ever uncovers much than what the opening regard did. On uncommon occasions, the 2nd look wholly upends conclusions made from the archetypal glance. That is however a vertebrate grounds from Adyar Estuary connected October 26 underwent a revision. 

The vertebrate was archetypal believed to beryllium a Dusky Crag Martin, and the photos were squatting successful the representation paper mostly unseen, adjacent little examined. Around a period later, a survey of the photos by an eBird reviewer demanded a re-identification of the bird. And arsenic it turned out, what had been seen connected the past Sunday of October successful 2025 was an altogether antithetic feather, 1 spiralling into Chennai for the archetypal time. The visitant to the Adyar Estuary, that day, that was mistaken for a Dusky Crag Martin was really an Indian edible-nest swiftlet (Aerodramus unicolor), besides known arsenic the Indian swiftlet. The vertebrate was photographed by Saravana Manian, the sighting taking spot successful the institution of a clutch of different birders.

Saravana Manian points retired that Adyar Estuary is an improbable terrain for the Indian swiftlet. He elaborates: “Previous records of the Indian swiftlet from Tamil Nadu person been from hilly oregon mountainous patches — Palani Hills, Kodaikanal, Sirumalai and the Coimbatore and Kanyakumari ranges of the Western Ghats. The vertebrate is besides recovered successful Sri Lanka.”

Besides hills and mountains, the taxon is besides known to “patronise” buildings abandoned for a agelong time. Habitats fitting these descriptions are a acold outcry from what exists successful and astir the Adyar Estuary, which makes this sighting decidedly baffling. From the viewpoint of probability, the unlikelihood of an Indian swiftlet “vacationing” astir the breached span successful the Adyar Estuary mightiness beryllium of astronomical proportions. In life, each sorts of unexpected events hap and mightiness travel crossed arsenic mysterious astatine archetypal glance. With diligent study, the enigma down specified events could collapse, and beryllium seen for what they are — the less-known hold of the natural. As successful life, truthful successful birding. 

In this species, the antheral is the nest builder. And the nest is successful the signifier of a cup, and it is licked into signifier by the antheral vertebrate utilizing its saliva. In definite parts, these cups spell into the making of gastronomic delicacies, earning the vertebrate its name, Indian edible-nest swiftlet.