A free-range flock is at higher risk of predation than confined birds. Providing natural and artificial cover in the form of bushes, boxes, branches will provide a degree of security and safe-haven when predators are detected.
Delightful patchwork tipi I'd love to sew for my daughter. The poles are 3 meters high and the inside of the tipi would be about six feet. A serious DIY project for a backyard hideout that might be used twice a year...but I do love it and it'd make some great childhood memories.