2025, North West Wildlife Trust, Marine Internships, Kittiwake Nesting in Irish Sea series https://portal.medin.org.uk/portal/start.php?tpc=015_6ed7623d-c133-414b-b31a-f1a56ceed59d Here we report the monitoring of Black-legged Kittiwake (Rissa tridactyla) on offshore wind farm (OWF) infrastructure in the Irish Sea off the Cumbrian coast. The monitoring of the Walney 1 & 2 offshore substations (OSS) continued into its third year, including a trial deployment of timelapse cameras. We also report the first census of breeding kittiwakes on turbine jackets at the Ormonde OWF. The 2025 counts at Walney 1 & 2 OSSs were similar to previous years, indicating a superficially stable population and potentially indicative of well-established colonies with reduced growth. The trial of timelapse cameras indicated their suitability for future monitoring on the substations and provided data on nest phenology, potentially confirming anecdotal evidence that offshore breeding is delayed. The census of Ormonde found 15 apparently occupied nests (AON) restricted to a single turbine jacket but with adult kittiwakes roosting throughout the wind farm. However, survey limitations prevented productivity estimates; continued monitoring of the kittiwake population within the arrays at Walney and Ormonde will further improve our understanding of the colonies. The following report was produced as part of the Marine Futures Internship; a collaborative project between Natural England, Ørsted, The Crown Estate and the North West Wildlife Trusts, which is funded by The Crown Estate and managed by Cumbria Wildlife Trust. 20260213T13:54:06