This is the 10628th most frequent Russian word.
возвращающихся
"Returning" (plural, genitive or accusative case).
Describes birds that are in the process of returning, modifying 'birds'.
Звуки возвращающихся птиц наполняли лес вечерним пением.
Sounds of birds returning filled the forest with evening songs.
Used as a present participle from 'возвращаться', describing flights that are returning.
Пассажиры возвращающихся рейсов будут проверены на наличие багажа.
Passengers of returning flights will be checked for luggage.
Used as a present participle modifying citizens, indicating that they are in the process of returning home.