乌燕鸥

(bird species of China) sooty tern (Onychoprion fuscatus)

abbr. for Ukraine 烏克蘭|乌克兰[Wu1 ke4 lan2] / surname Wu

crow / black

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]

common gull