They’re pretty loud in general so you would probably know, but they don’t tend be like to hang about indoors. Might just be house sparrows if you’re hearing them on the warehouse floor.
You should download the Merlin ornithology app. It’s built by the Cornell ornithology lab and has picture and sound ID features for birds as well as just a lot of generally useful identification information.
Now that you mention that I can probably guess where the nest was in our building. I hear birds chirping in our warehouse all the time.
They’re pretty loud in general so you would probably know, but they don’t tend be like to hang about indoors. Might just be house sparrows if you’re hearing them on the warehouse floor.
You should download the Merlin ornithology app. It’s built by the Cornell ornithology lab and has picture and sound ID features for birds as well as just a lot of generally useful identification information.