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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.
You seem to be conflating two unrelated points. When people say “tourists need to go home” or “we need less tourists,” they aren’t referring to some philosophical argument for the existence of tourism as a gauge of economic health for the middle class.
These phrases are almost exclusively speaking in regards to tourism’s negative effects on the local environment and population. Heavy tourism has a tendency to cannibalize an areas resources and then alienate or push out the native population.