纯色岩燕

(bird species of China) dusky crag martin (Ptyonoprogne concolor)

color / CL:種|种[zhong3] / look / appearance / sex

(coll.) color / used in 色子[shai3 zi5]

pure / simple / unmixed / genuine

cliff / rock

variant of 巖|岩[yan2]

variant of 岩[yan2]

variant of 巖|岩[yan2]

Yan, a vassal state of Zhou in modern Hebei and Liaoning / north Hebei / the four Yan kingdoms of the Sixteen Kingdoms, namely: Former Yan 前燕[Qian2 Yan1] (337-370), Later Yan 後燕|后燕[Hou4 Yan1] (384-409), Southern Yan 南燕[Nan2 Yan1] (398-410), Northern Yan 北燕[Bei3 Yan1] (409-436) / surname Yan

swallow (family Hirundinidae) / old variant of 宴[yan4]

variant of 燕[yan4]

(bird species of China) Eurasian crag martin (Ptyonoprogne rupestris)