{"fact":"Crows don't just preen themselves—they allopreen their fellow crows, focusing on the head and body, which highlights the value they find in maintaining close social bonds.","context":"We examined the region allopreened in a subset of species and found that preening a partner’s head was predicted by both close physical proximity and active feeding, while body allopreening was only predicted by close physical proximity.","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":672}