Here is an older recording I made in 2013. In the warm months the open garage of my house always is a home for barn swallows. In this year however the cracy birds decided to explore other open rooms of the house and give their squabs a flying lesson in the upper corridor. Naturally we prohibited this because of the mess the birds made, but before this I left a recorder running in the corridor for an hour to hear what happens. This is a summary cut of the result. Grab some headphones and enjoy!