rectrix

n.

舵羽（鸟尾上的硬毛）；

复数：rectrices

Rectrix Shape as an Indicator of Age in the Wood Thrush
Fall Remex and Rectrix Molt in the Cardinal
Aging Catharus thrushes by rectrix shape
Divergent rectrix moult: the implications and conditions of moult sequence
Patterns of rectrix rachis modification in pintails and the evolution of sexually selected traits
A new method of determining ovenbird age on the basis of rectrix shape
Rectrix Shape as an Indicator of Age in the Wood Thrush (La Forma de las Rectrices como Indicador de la Edad en Hylocichla mustelina)
A cautionary note on the ageing of Firecrests regulus ignicapilis using rectrix shape
Aging Catharus Thrushes by Rectrix Shape (Utilización de la Forma de las Rectrices para Determinar la Edad en Zorzales del Género ...
A New Method of Determining Ovenbird Age on the Basis of Rectrix Shape (Nuevo Método Para Determinar la Edad de Seiurus aurocapillu...