The whole island makes up the barangay of Dalupiri, which is part of the municipality of Calayan in Cagayan province, which had 621 inhabitants in 2020, up from 611 in 2010.

The island has an elongated elliptical shape orientated along a north–south axis, the island has a length of about 18 km (11 mi), with a width of about 7 km (4.3 mi) at its widest point.

The island has an area of 166 square kilometres (64 sq mi).

A small population of the Philippine crocodile (Crocodylus mindorensis) is also native to the island.

[4] Of the avifauna (birds) present on the island, the nankeen night heron (Nycticorax caledonicus) and the Zebra Ralle (Gallirallus torquatus) both are known to breed on the island.