{"fact":"Despite being highly specialized cachers, not all crows store food in the same way. Clark's Nutcrackers use a sublingual pouch, while Pinyon Jays have an expandable esophagus to carry their treasures.","context":"Nutcrackers have evolved a sublingual pouch (Bock et al. 1973), whereas pinyon jays have evolved an expandable oesophagus (Vander Wall & Balda 1981).","source":"Selvino R de Kort; Nicola S Clayton, An evolutionary perspective on caching by corvids, 10.1098/rspb.2005.3350","index":473}