Term Name: rectrix feather
Synonyms: rectrices, rectrix, retrices, retrix, retrix feather
Definition: A flight feather that lies along a single horizontal row on the rear margin of the anatomical tail. Only the central pair are attached (via ligaments) to the tail bones; the remaining rectrices are embedded into the rectricial bulbs, complex structures of fat and muscle that surround those bones. Rectrices are always paired, with a vast majority of species having six pairs. They are absent in grebes and some ratites, and greatly reduced in size in penguins
Ontology: Uberon Ontology [UBERON:0011794]

Relationships
is part of: tail
is a type of: flight feather tail feather