I have a problem with birds and I'm open to any of your suggestions. My kitchen and my dining room attract black minor birds to visit. Baobei hangs out in the kitchen but she's quite useless and they come in anyway. She just looks at them and doesn't do anything. In frustration I ask Tim why they keep coming in, and he says it's because our house is a bird sanctuary. Unfortunately, the correct description should be bird toilet.
They come in, walk around a bit like they're checking my place out....do their business, sometimes several times (to my utter dismay) and then leave. There are some stupid ones that proceed to check out my living room and fly around trying to exit via the skylight but find they can't. All this brings about a degree of nervous anxiety in them, and this brings on even more unwanted deposits. Often these are yellow, but sometimes red.........I suppose it depends on what they've been eating. All the food in my kitchen is put away so there is nothing exposed on the countertops.....things like bananas, bread etc........nothing for them to come in for.
I have invested in waterguns and catapults to tackle this issue. However, after a few stakeouts and some bad aiming, the problem still prevails. Now I resort to closing the kitchen backdoor, kitchen window & dining room sliding door.....sitting there with no fresh air coming in, just so I can minimise picking up bird poop for a change.