The Sparrow Brick is a modular terracotta birdhouse and feeder (20x20x20cm) that integrates into walls like a standard brick or stands alone. Designed for residents, communities, and architects, it solves urban sparrow habitat loss by providing secure, insulated nesting space that is easy to clean due to its detachable component. It is sustainable because it is made from locally sourced, recyclable terracotta and promotes biodiversity and resource efficiency in construction.