Marine distribution and foraging habitat highlight potential threats at sea for the Endangered Bermuda petrel Pterodroma cahow

Marine spatial planning relies on detailed information of marine areas to ensure effective conservation species. To enhance our understanding habitat use by the highly pelagic Bermuda petrel Pterodroma cahow , we deployed GPS tags 6 chick-rearing adults in April 2019 and constructed a suitability model using locations classified as foraging explore functional responses selection environmental variables. We defined 15 trips for 5 individuals, ranging from 1-6 per bird, that included both short long excursions indicative dual strategy optimizes chick feeding self maintenance. The maximum distance birds flew during ranged 61 2513 km (total trip lengths: 186-14051 km). Behaviourally deduced was best predicted at shorter distances colony, under warmer sea surface temperature, greater height, deeper water compared transiting locations; results indicated suitable exists beyond core home range population, far north productive Gulf Stream frontal system, within territorial waters USA Canada. Our are crucial inform management decisions international efforts better identifying potential threats encountered this globally rare seabird highlighting jurisdictions potentially responsible mitigating those threats.