Watch out with that remodeling!
After the first bird family moved out of their nest on top of the motion detector in our front porch, a second family moved in. Apparently these are different species (some sort of swallows this time) and have different preference about how to build a nest. The original one was made from moss and dirt. The new comers decided to do some remodeling and build something out of twigs and grass on top of the original nest. Unfortunately they are not very good at this, the whole added part fell off today. The good thing is that this failure did not seem to bother them, they just stay in the old nest and get on with their life.