Those are easy questions! Lowes sells live houseplants indoors and there's always a source of water for them in the drip catching trays and those birds know where the water is. Lowes also sells wild bird seed and there are always broken bags of seed and spilled seed around, so the lucky birds that live indoors have it made. They nest up in the rafters, safe from the predatory crows and ravens in the outside garden department that eat their eggs and chicks, and they enjoy year round climate control, too!
The only wild birds that go inside Lowes deliberately here in the Northeast US are birds that are drawn to human habitation, namely house sparrows (aka English Sparrows) and house finches. I live three miles away on a dirt road on a lake and those "city birds" rarely venture into the wooded areas. I suppose pigeons hang out at some Lowes locations but we don't have many at my store in Maine. Some other species such as hummingbirds (very frequent with all the flowers) and the occasionsal Cardinal, Bluebird or Mourning Dove visit the outdoor garden area, but only end up inside by accident.
Birds build nests wherever they can indoors and in the outdoor garden departments, including in the plants that are for sale, in pallets of merchandise stored way up on metal racks 20+ feet up, and in the metal rafters and lighting fixtures. I'm surprised I haven't found any nests in the birdhouses we sell. Unfortunately some nests are disturbed when pallets are brought down and plants are sold but our garden manager tries to avoid taking down pallets with active nests.
Some birds actually seem to wait for the automatic doors to the outdoor garden area to open and spend some time inside and some outside. Some even seem to know how to trip the automatic doors by flying close to the sensors! However, many inside birds stay inside where they have everything they need.
We also have a few indoor chipmunks running around and I assume that after closing a few mice probably make an appearance.
