I have an idea for a story, though it might not necessarily be a storygame. Basically, pigeons and other similar birds have started appearing in large quantities throughout the city, even though it's winter, and have become a serious health risk because of how often they crash with moving vehicles, people, and things like satellite dishes and electric towers (remember, these are tons worth of aviary fiends), and their feces (due to their sheer numbers) are pretty much anywhere outside. So a low-paid guy is pretty frustrated, because local authorities have deemed that going outside is dangerous and so his workplace stays closed, leaving him without pay for a few days (I could really do with some alternatives to this). He stays inside with low resources, trapped with a few roommates, as the birds outside start becoming more aggressive, and growing in species (originally there were only pigeons, now there would also be falcons and hawks or something like that). Eventually, they need to get outside and realize how terrible the situation is.
Outside of that, I don't have many ideas. The birds in winter mean that they are evolving and adapting to harsher enviroments, and they would be kinda like rats, vermin that gradually goes from a nuisance to an actual danger, they would gradually start hitting windows and doors trying to get in, then they'd become smarter and start going for holes or specific weakpoints in the house and leaving their droppings in certain places where the protagonist would most likely breath them. The premise would follow the protagonist putting up with the situation, and how he and his roommates react, some growing more paranoid, another one getting ill because of going outside repeatedly despite the birds (bird dropping dry up, turn to dust and cause illnesses). I know it sounds absurd, and that is part of what I'm aiming for. I'd like to hear what you have to say about that concept, and how could I better the original concept.