A friend found a baby common swift on the ground, he let us have it and now we are on a quest to try and save it. These beasts are quite wonderful, they fly for months in a row, only touching the ground to breed like once a year. Saving this chick will probably be very hard as they are quite sensitive to human fungi and bacteria and they can't damage their wings or feathers in the least.
Anyhow first step for tomorrow morning: see if we can find the proper food (crickets, wax moth larvaes, bee drones) here in Madrid.
I'm going to document the process and put some pictures. Hopefully all will go well and we'll see how he flies away in 4 or 5 days or so. If not, we at least informed ourselves and did what we could.
PS: This site seems to be a wonderful place to learn about this amazing bird.