Because of cylindrical shape of the Gilbertson nestbox, it is difficult to install traps like the VanErt and Huber trap, so Steve designed a special clip on trap.
Note: These images were scanned from Dorene Scriven’s book, Bluebird Trails – A Guide To Success, and uploaded from the former website The Bluebird Box with permission. 
MORE INFORMATION & RESOURCES:
- Trapping, House Sparrows
- Traps, House Sparrow, Review of
- Trap, Bauldry
- Trap, Gilbertson
- Trap, Huber
- Trap – Krueger Snake Trap Plan
- Van Ert, Floyd, Trap
May all your blues be birds.
– Bet Zimmerman Smith
