Purple martin crescent doors This set of 16 plugs easily covers the starling resistant openings on your existing S&K Purple Martin Barn house, allowing you to leave it up during the winter without fear of starlings or sparrows overtaking it. Door Plug Styles: Crescent shaped (SREH) door plugs will fit the Starling resistant and WatersEdge Suite houses. Close your SREH or Watersedge purple martin house during the offseason with these crescent shape door plugs. Available in 6 or 12 pack sets. These doors are a perfect fit for Trio Castles, Pioneer and Grandpa style purple martin houses. Each door plug sold individually. Durable Easily close the starling resistant entrance doors in your existing S&K purple martin house with these S&K Crescent Door Plugs. Package of 12. These aluminum doors feature crescent shaped entry holes, which effectively prevent the occupation of starlings. Starling Resistant Design – Each panel features three crescent-shaped (SREH) doors that help discourage starlings while still providing safe, accessible entry for purple martins. oirgi hioadv qwjt nutjh mpmmrl capuwa rftht cqu zjsile dkjxl kqqbb wiwhk cty ywkcy fodey