'What was that?' Sound in the night??

[MonstaPirate]

So I am currently playing a very heavily modded Stardew Valley. I am completely unsure what this overnight sound is from. When the day ended, I got a sound notification that said, "What was that?" and in the morning I had a 'spooked' condition that reduced attack (something else as well, cannot remember), and upped my speed. Looked all over the valley for the source. No letter, no explaination, nothing.

My suspicion mods are:
- Stardew Valley Expanded
- Adventurer's Guild Expanded

Please let me know if you have any idea what this is?

 

[GrumpyAughra]

A feature of this mod, perhaps? Edit: or this, More Nightly Events doesn't do anything on its own but SH's Wild Animals have it as an optional requirement for added features.