A: “Dutch ecologist over here. This building is probably about to be demolished. They are making this building “nature-free.” The blocks are used for Swifts. Nesting places for Swifts are year-round protected, so also in winter when they are not here. The Swifts had already left for Africa, so they plugged the holes to prevent something else from entering before demolishing the building.

All of this is done to prevent the killing of protected species before demolishing a building. And if they are going to build something new in the place of this building, then there should be at least as many accommodations built in for Swifts in the new building.”