There were nests of House Swifts (Himeamatsubameヒメアマツバメ) near the top of a bank, which was just opposite from where we stayed.
In the evening, I heard them screeching around the nests, flying busily in and out.
I managed to take some pics of the parents in the morning.
I failed to take a photo when a parent actually went into the nest but saw them do so several times.
I feel so lucky that our room was on the 7th floor and that we were able to see them quite close from the window!