Adjective
Of or pertaining to the rictus; as, rictal bristles.
Source: Webster's dictionaryThe feathers of cormorants soak up water and help to reduce buoyancy, thereby allowing the birds to swim submerged. citation Rictal bristles of a white-cheeked barbet Bristles are stiff, tapering feathers with a large rachis but few barbs. Source: Internet
Rictal bristles are found around the eyes and bill. Source: Internet