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What are “excluder” entrances?

April 26, 2017entrances excluder

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What are “excluder” entrances?

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Excluder entrances were designed by Duke Snyder to completely exclude starlings from entering Purple Martin houses. They are “bat-shaped” entrances and have been successfully used on porched housing, but have not proven successful on porchless housing. See Purple Martin Update 10(1): 8-10, “A Revolutionary New Entrance Hole Design: Duke Snyder’s Starling Excluder”. Retrofit excluder entrances can be purchased for Trio martin houses from the PMCA online catalog.