Long-distance migrants have developed diverse strategies to deal with the challenges imposed by their annual journeys. These are relatively well studied in some avian groups, such as passerines, shorebirds and raptors. In contrast, few studies have addressed the migratory behaviour of pelagic birds in the light of current theories of optimal migration. Using a dataset of 100 complete migratory ...

Data matters. Senator Cory Booker’s mantra is ‘in God we trust . . . Everybody else, bring me data’,1 and the federal government’s less catchy term for data-driven law and policy is ‘evidence-based practices’.2 Yet the privatization of familymaking generally— coital and technological—has translated to lack of government record-keeping, leaving scholars, journalists, courts, legislators, and adv...