Common mergansers nest in tree cavities, nest boxes, cliff crevices, and on the ground, generally near clear-water rivers in forested regions and on … Make a 10″ by 10″ floor (inside dimensions) and a 33″ floor to ceiling height (inside front). Fasten duck boxes firmly to metal (preferable) or to wood posts. Plywood consists of glued, thin laminated panels. Common Merganser (Mergus merganser) The largest of the cavity-nesting ducks, the Common Merganser feeds largely on fish and crustaceans and is found along large rivers and lakes. Make sure you put it up well before breeding season. Barrow’s Goldeneye Nest Box. Use wood stock rough-cut on both sides so birds can grip surfaces. Attach a guard to keep predators from raiding eggs and young. It makes for easy assembly in minutes with a power or hand held screwdriver. Predation from snakes, raccoons and a number of other mammals and birds is a horrible thing. The common merganser nest box has a 10″ by 10″ floor, 33″ inside ceiling, 5″ by 5″ square entrance opening located 30″ above the floor (to the top of the opening) and ventilation openings in the floor and under the roof. They usually vary from 5 1/4″ to 5 1/2″ wide and 7 1/4″ to 7 1/2″ wide. Side Opening Doors may be better than hinged roof doors for duck houses and possibly more convenient and safer for other birdhouses as well. Drill countersunk pilot holes in primary work pieces. See. Drill pilot holes in these long panels for mounting. Place a horizontal slab of wood immediately below the entrance hole on the front of the box. Such adept swimmers, common mergansers will dive into raging torrents for fish, frogs and mollusks, even under ice until water is nearly completely frozen. Females lay six to sixteen ivory-white eggs around June which hatch after about one month of incubation. Drill regular pilot holes in secondary work pieces. Please refer to this article for further information. They usually vary from 5 1/4″ to 5 1/2″ wide and 7 1/4″ to 7 1/2″ wide. Want to know who you might find living in your area? The Common Merganser, often called the Goosander in Europe, is the largest of the sawbilled ducks. squirrels may use this box. Don't forget to monitor your nest box and submit nesting data to NestWatch! Pileated Woodpecker, Common Merganser 11 1/4" x 9 3/4" 24" 17" 4" Pileated 6"x5" C. Merg 20-30' P 12-17' CM 3' x 3' chicken wire - construct cone, line with tar paper and wire sticks in bottom. Build a common merganser nest box with cedar, pine or most any softwood. The below nestbox is designed for the Common Merganser. Consider putting up a nest box to attract a breeding pair. No perches at the entrance holes as they would aid predators. Nest boxes can be located from shoreline up to 1/3 mile from water. Wrens  |  Chickadees  |  Nuthatches  |  Woodpeckers  |  Phoebes & Flycatchers, Bluebirds  |  Swallows & Martins  |  Robins & Platform Nesters  |  Raptors  |  Ducks. Cut them to width and secure well. Always protect with 3′ wide cone predator guards around the post, under the box. The below nestbox is designed for the Common Merganser. We at 70birds have no interest in your information. Use wood stock rough-cut on both sides so birds can grip surfaces. Please do not attract duck families and … If above ground, locate near ponds and where vegetation provides cover for ducklings to travel to water. Drill regular pilot holes in secondary work pieces. Reinforce with chamfer strips (inside) or batten strips (inside or outside) fastened perpendicular to vertical panels. See the common merganser nest box page and view or print nest box plans. Find a nest? Some birders attach wire mesh on the inside front panel to help ducklings climb out of the box. Suitable Nestbox Size: 33 inches tall. Although some experts disagree with the notion that ventilation openings are needed at all. * These birds prefer a nesting platform, not an enclosed box. Learn what features are best for birds and their safety, Find out which bird you can help give a home at your habitat and region, Clutch Size & Phenology for Common Species, Managing House Sparrows and European Starlings.