Greetings from Hitchcock.

The artist said those birds are cuckoos.
There is a Japanese idiom that says "call of the Japanese cuckoo" (kanko-dori ga naku, 閑古鳥が鳴く). It means "business is bad, deserted, in a slump."

Thanks, trying to decipher this was driving me nuts.

DRUNKEN FRENZY

The birds are literally cucks.