cte sa'a cpi lujvo

x₁ is a nightingale of species/variety x₂.

In notes:

ctecmocpi: x₁ is a nightjar/goatsucker/whippoorwill of genus/species x₂.
turdida: x₁ is a bird of family Turdidae (thrush, bluebird / American robin etc.) of species x₂