{"fact":"Despite being distantly related, Hawaiian crows and New Caledonian crows both evolved sophisticated tool-using skills, likely due to similar environmental pressures on their remote island homes.","context":"‘Alalā and New Caledonian crows evolved in similar environments on remote tropical islands, yet are only distantly related, suggesting that their technical abilities arose convergently. This supports the idea that avian foraging tool use is facilitated by ecological conditions typical of islands, such as reduced competition for embedded prey and low predation risk.","source":"Christian Rutz; Barbara C. Klump; Lisa Komarczyk; Rosanna Leighton; Joshua Kramer; Saskia Wischnewski; Shoko Sugasawa; Michael B. Morrissey; Richard James; James J. H. St Clair; Richard A. Switzer; Bryce M. Masuda, Discovery of species-wide tool use in the Hawaiian crow, 10.1038/nature19103","index":9}