Discourage starlings from entering your Trio martin housing by using the Excluder® entrance with its revolutionary double-peg design.
The replacement doors fit Trio Castle, Mini-Castle, Musselman, Grandpa, Grandma, and Wade.
*USE WITH ENLARGED COMPARTMENTS*
Due to the restrictive nature of starling resistant entrances, we recommend that these replacement plates be used on housing with enlarged compartments. The 6”X6” size of standard Trio compartments can make use of these entrances difficult. Read how to enlarge your Trio house compartments here: *A Guide for Modifying Trio Houses*