Captain Holt: Huh. [sighs] It's nowhere.
Sergeant Jeffords: Uh, maybe you could flush out the corn crake by doing its mating call?
Captain Holt: I don't know why a corn crake would make such a call three months after its rooting season, but I suppose it can't hurt to try. [imitates bird squawking]
[elsewhere:]
Kevin: Hold on. That call. That's the call a corn crake makes when it wants to root. I'll respond. [clears throat] [imitates bird call]
Captain Holt: [imitates bird call]
[back:]
Kevin: This way.