Cedar Sweep the whole world is sleeping

They were working together, sort of, but coming up with nothing. Just when Titmouse was thinking it would be better if he just ditched the other guy (as if that would make things better, being alone again), Delight made a very obvious comment that made Tit's ears pin back. He almost sniped back with, yeah well neither have you! 

He glanced at Delight in his periphery, but before anything could be stated - and before Tit could really think - there was a weird sound penetrating the dense forest around the two of them. It was like... Like a scream! Nothing the boy had ever heard before though. It was incredibly loud and grating. So much so that Tit's reaction was to duck, and the dark hairs along his spine raised without prompting.

The sound came again a moment later, but from further away - still quite loud, but obviously in transit.
The hell was that? Demanded the boy, snapping to attention with his nose in the air.