In the course of the facade renovation of the building Hans-Busch-Institut, one that belongs to TU Darmstadt and was designed and planned by Ernst Neufert and Wolf Rösel, why the friday developed new nest boxes for the birds that nestle there every year. Stylistic idiom, functionality and design were developed in coorperation with the university´s construction department. In exchange with the association for Nature Conservation we verified the bird´s needs. The elongated rectangular stylistic idiom fits into the facade image which is characterized by this form anyway. The three colors were matched to the clinker bricks and were arranged on the facade.