{"fact":"Crows are selective about which of their feathered friends to preen, choosing those they trust enough to let close, just like you might choose a confidant over a mere acquaintance.","context":"Results revealed that providing allopreening to a partner was significantly predicted by often being in close proximity, but not engagement in active feeding or agonistic behavior.","source":"Alejandra Morales Picard; Roger Mundry; Alice M. Auersperg; Emily R. Boeving; Palmyre H. Boucherie; Thomas Bugnyar; Val'erie Dufour; Nathan J. Emery; Ira G. Federspiel; Gyula K Gajdon; Jean‐pascal Gu'ery; Matjaž Hegedič; Lisa Horn; Eithne Kavanagh; Megan L. Lambert; Jorg J.M. Massen; Michelle A. Rodrigues; Martina Schiestl; Raoul Schwing; Birgit Szabo; Alex H. Taylor; Jayden O. van Horik; Auguste M.P. von Bayern; Amanda Seed; Katie E. Slocombe, Why preen others? Predictors of allopreening in parrots and corvids and comparisons to grooming in great apes, 10.1111/eth.12999","index":673}