{"product_id":"the-grand-gatekeeper-purple-martin-house-s-k-12-room-starling-resistant-pole-mount-habitat","title":"The 'Grand Gatekeeper' Purple Martin House | S\u0026K 12-Room Starling-Resistant Pole-Mount Habitat","description":"\u003ch3 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eThe Experience\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eFor the Purple Martin landlord ready to run a serious colony program, twelve rooms across two floors is where ambition meets infrastructure. The Grand Gatekeeper is the expanded expression of the same S\u0026amp;K engineering that defines The Gatekeeper — crescent SREH entrances that physically exclude European Starlings, convertible hole geometry for landlords who prefer the traditional round configuration, and a flexible room design that lets you tailor compartment dimensions to your colony's needs. Built from UV-stabilized copolymer plastic in the USA by Scenic Rivers Industries, this is a purple martin nesting box engineered for the landlord who isn't experimenting anymore. Twelve rooms. Two floors. One serious colony program.\u003c\/p\u003e\n\u003ch3 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eScientific Engineering\u003c\/h3\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eStarling-Resistant Crescent Entrance Holes (SREH):\u003c\/strong\u003e Each of the 12 compartments features a precision crescent-shaped opening measuring 2.25\"W x 1.125\"H — dimensioned to admit Purple Martins comfortably while physically preventing the larger body profile of European Starlings from gaining entry. Passive exclusion, active every hour of every day.\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eConvertible Entrance Hole Geometry:\u003c\/strong\u003e SREH entrances can be converted to traditional round entry holes for landlords managing established colonies accustomed to the classic configuration — a flexibility no other entrance style offers.\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eAdjustable Room Configuration:\u003c\/strong\u003e Standard compartments measure 6\"L x 6\"W x 6\"H. Remove dividers to expand individual rooms to 6\"L x 6\"W x 12\"H, reducing total room count while providing expanded nesting space — a meaningful option for landlords prioritizing nestling development over maximum occupancy.\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eCenter Pole Pass-Through Design:\u003c\/strong\u003e Engineered for a triangular telescoping pole through the center of the structure, enabling full raise-and-lower capability for nest monitoring, competitor eviction, and end-of-season cleanout — the non-negotiable standard for responsible colony stewardship.\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eVentilated Door Panels:\u003c\/strong\u003e Each compartment features ventilated doors that maintain interior airflow during peak summer nesting season, reducing heat stress on nestlings during critical development windows.\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003ePerimeter Landing Rails:\u003c\/strong\u003e Full-floor landing and take-off rails on both levels provide abundant perching area, reducing approach fatigue and supporting natural pre-entry behavior for martins of all experience levels.\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eUV-Stabilized Copolymer Plastic:\u003c\/strong\u003e White exterior panels reflect solar radiation to regulate interior compartment temperatures, while the UV-stabilized composition resists fading, cracking, and structural degradation across decades of outdoor exposure.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eBoutique \u0026amp; Conservation Values\u003c\/h3\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003ePassive Starling Exclusion with Traditional Flexibility:\u003c\/strong\u003e The convertible entrance hole system gives the Grand Gatekeeper a versatility unique in production martin housing — SREH protection as the default, traditional round hole configuration available when colony history calls for it.\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eScenic Rivers Industries:\u003c\/strong\u003e Your purchase directly supports a workshop providing dignified, meaningful employment for people with disabilities — making the Grand Gatekeeper one of the few purple martin nesting boxes that contributes to both wildlife conservation and human community in a single transaction.\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eHeritage Manufacturing:\u003c\/strong\u003e Proudly Made in the USA.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eSpecifications\u003c\/h3\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 21\" L x 20\" W x 21\" H\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eFloors:\u003c\/strong\u003e 2\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eRoom Count:\u003c\/strong\u003e 12 (standard) \/ 6 (expanded configuration)\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eRoom Dimensions:\u003c\/strong\u003e 6\" L x 6\" W x 6\" H standard \/ 6\" L x 6\" W x 12\" H expanded\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eEntrance Hole Style:\u003c\/strong\u003e Crescent SREH (convertible to round)\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eEntrance Hole Dimensions:\u003c\/strong\u003e 2.25\" W x 1.125\" H\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e UV-Stabilized Copolymer Plastic\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Center pole pass-through — triangular telescoping pole (sold separately)\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eShipping Weight:\u003c\/strong\u003e 9 lbs.\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Proudly Made in the USA\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\u003cstrong\u003e⚠️ Assembly Required\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cbr\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0692\/5608\/5583\/files\/SK-PBH-12_8_lg.pdf?v=1772236393\" target=\"_blank\" rel=\"noopener\"\u003eGRAND GATEKEEPER MANUAL\u003c\/a\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"S\u0026K Manufacturing","offers":[{"title":"Default Title","offer_id":45242162675791,"sku":"SK-PBH-12","price":119.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0692\/5608\/5583\/files\/SK-PBH-12_M_LG_b4c2d620-79da-4709-8492-6eb53dbd02ca.jpg?v=1778782134","url":"https:\/\/midwestnestshop.com\/products\/the-grand-gatekeeper-purple-martin-house-s-k-12-room-starling-resistant-pole-mount-habitat","provider":"Midwest Nest LLC","version":"1.0","type":"link"}