It's best to have a detail spray/waterless wash product, and a microfiber towel in your vehicle handy for these situations, as they provide better lubrication and will avoid scratches on your paint from wiping dirt/grime across the surface.
Unfortunately, at this time we don't sell any of these products. We definitely have some on the works, but it will be a few months before we release anything.
When dealing with bird droppings it's always recommended to clean it off right away, just spraying a product on the bird poo and leaving it is not recommended. Since bird droppings are very acidic, it has the chance to etch your paint if left on the paint.
We have our Super Cleaner that would work on bug guts, bird poop, or tree sap, but we don't really recommend it for this purpose since it isn't versatile enough since it shouldn't be used on glass.