Urbanization changes natural environments by transforming the landscape and reducing local biodiversity. However. some urban areas with heterogenous habitats can represent a supplementary breeding environment for non-urban birds. Successful and unusual breeding of Grey Heron (Ardea cinerea) and Crested Tit (Lophophanes cristatus) was found in Zvolen city (C Slovakia). https://mabelandfoxs.shop/product-category/wooden-blocks/