Materials

• Flax straw (1 50-pound square bale usually makes 5-7 tunnels)

• If flax is not be available in your area, then substitute with the most durable grass or straw you can find. Wheat and barley straw are too light and don’t work well.

• Use grass hay for nesting material. Delta has had success with brome hay and other grasses. In Minnesota and South Dakota, flax works well for both the exterior and nest material.

• 8-foot long base pipe (1.5” square tubing)

• 30-inch long adjustable insert pipe (1” square tubing)

• 18-inch long cradle support pipe (1” square tubing)

• 7’x3’ section of welded wire fencing (2” by 1” mesh with 14 gauge wire) – this is double rolled with flax to form the Hen House

• Wire must be firm to prevent tunnel from bending (i.e., no “chicken wire”)

• Two 20-inch lengths of ¼” steel rod, bent to form cradle

• 12 hog rings and 1 bolt or wire-lock pin to attach insert to post

Total cost will vary with location, steel prices and quantity purchased.

Steps for Assembly

1. Drill two to three equally spaced holes along the 30” insert pipe for height adjustment. Then drill one hole in base pipe about 8” from the end.

2. Weld insert pipe to the 18” cradle support pipe, midway along. This will form a T.

3. Bend ¼” rod pieces into semi-circles. Then weld one at each end of cradle support pipe.

4. Roll up three feet at one end of 7’x3’ wire fencing and hog ring in 3-4 places to form an inner tunnel.

5. Spread approximately 2” of flax straw (or equivalent) on remaining 4’ of fencing, then continue to roll tightly. Hog ring end of fencing to complete the Hen House, providing an 11-12” diameter opening on each end. Try not to exceed 12” as Canada geese may use larger Hen Houses.

Steps for Maintenance

1. Revisit every year a month or two prior to the nesting season.

2. Check for and record nesting activity from the previous year. Look for a nest bowl with down, egg fragments, egg membranes, or whole eggs.

3. Repair exterior by replacing missing flax straw. Hens often remove straw and add to nest bowl.

4. Remove old nest remains and add new grass to the inside of the tunnel. Make sure Hen House is one-half to two-thirds full of grass.

Stay Up To Date With Delta Waterfowl

Card Image

Delta Waterfowl Supports Oklahoma Legislation to Provide Structure to Guiding and Outfitting

3/13/2026

Bill to create better guardrails to manage waterfowl guiding passes Senate

Read more
Card Image

Delta Waterfowl Achieves Historic Milestone: 100,000 People Introduced to Duck Hunting

3/13/2026

First Hunt, the largest waterfowl hunter recruitment program in North America, helps to ensure a strong future

Read more
Card Image

Delta Waterfowl Receives Grant from Mathwig Trust to Launch Breeding Duck Habitat Initiative

3/9/2026

The award supports hiring a habitat extension coordinator to strengthen landowner relations and conserve small wetlands

Read more

Put more ducks over decoys

Delta uses science-based solutions to produce ducks, conserve prairie wetlands, and ensure the future of waterfowl hunting. Donate today!