i have 2 wood ducks. there ducklings. i think if i remeber they hatched on the 26th? not sure. they are being raised in my coop by a broody cochin bantam hen. they are doing great, growing bigger everyday. love chasing the flys around. anyway, im moving to my dads and we dnt have a coop. so were going to build a pen on the outside of the barn. not sure how big, but pretty decent size. when they start flying, all my dad has is a little creek about 20 ft away from were the pen is going to be built. question is.... if they dont learn to go into the pen at night.... were will they roost.? theres a tree up the bank thats got pretty thick coverage in it.... will they roost in that.?