Bird nesting box i.e. hanging bird nesting box, for e.g. wrens, has primary access port partially covered from diaphragm and partially formed with secondary access port before primary access port is attached with secondary access port

摘要

The box (10) has a box-shaped housing (11) provided with side pieces (11a, 11b). A primary access port (14) is formed in an inner space of the housing in one of the side pieces. A diaphragm (16) comprises a secondary access port (18) provided with smaller cross-sectional area in a detachable and replaceable manner. The primary access port is partially covered from the diaphragm and partially formed with the secondary access port before the primary access port is attached with the secondary access port. The side pieces and the diaphragm are made of timber material.