Protection of Kiritimati Seabirds through Invasive Species Management

Abstract

The Wildlife Conservation Unit and BirdLife International successfully completed baiting operations to eradicate Pacific rats from 13 motu including Motu Upua in the Kiritimati Central Lagoon. Four of these motu were previously rat free (Drum islets) and 3 others (Nimroona islets) had been baited in 2023 but rats (and one cat) were confirmed present likely following a reduction in the water level of the lagoon. The 14-day field mission also strengthened WCUs capability for detecting rats and cats and in the use of tools and practices to eradicate them. A suppression response for cats was initiated on Big Peninsula but requires WCU personnel to have regular access to vehicles to operationalise it. Observations of seabirds confirmed Phoenix Petrel numbers remain high for the Drum and Nimroona islets, but few nesting Red-tailed Tropicbirds were observed and may be attributable to the widespread poaching of these and other seabirds. Access to vehicles enabling reinstatement of regular patrols by WCU personnel is considered critical and could be facilitated through specialist expertise and the provision of parts in making repairs to the existing fleet. Other recommendations include a regular surveillance programme for priority islets to detect and respond to rat incursions.