The 'Grand Gatekeeper' Purple Martin House | S&K 12-Room Starling-Resistant Pole-Mount Habitat

The Experience

For 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&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.

Scientific Engineering

• Starling-Resistant Crescent Entrance Holes (SREH): 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.
• Convertible Entrance Hole Geometry: 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.
• Adjustable Room Configuration: 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.
• Center Pole Pass-Through Design: 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.
• Ventilated Door Panels: Each compartment features ventilated doors that maintain interior airflow during peak summer nesting season, reducing heat stress on nestlings during critical development windows.
• Perimeter Landing Rails: 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.
• UV-Stabilized Copolymer Plastic: 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.

Boutique & Conservation Values

• Passive Starling Exclusion with Traditional Flexibility: 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.
• Scenic Rivers Industries: 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.
• Heritage Manufacturing: Proudly Made in the USA.

Specifications

• Dimensions: 21" L x 20" W x 21" H
• Floors: 2
• Room Count: 12 (standard) / 6 (expanded configuration)
• Room Dimensions: 6" L x 6" W x 6" H standard / 6" L x 6" W x 12" H expanded
• Entrance Hole Style: Crescent SREH (convertible to round)
• Entrance Hole Dimensions: 2.25" W x 1.125" H
• Material: UV-Stabilized Copolymer Plastic
• Mounting: Center pole pass-through — triangular telescoping pole (sold separately)
• Shipping Weight: 9 lbs.
• Country of Origin: Proudly Made in the USA
• ⚠️ Assembly Required

GRAND GATEKEEPER MANUAL