wood ducks are very beautiful birds but they tend to be a bit shy . i have two pairs ,an old one and a 2 year old one, the old hen is pinioned (i consider her my special needs duck)all the rest of my ducks are excellent flyers and their aviary is almost 3 m tall and closed on the top . they will not lay a single egg unless u provide nest boxes for them. i put my nest boxes 1,5- 2 m of the ground (u will need a ramp if you get pinioned birds) , the direction of the entrance hole of the nest box should be east-southeast and have view to the pond (they simply will not use a nest box if the position is not to their liking,the first year you will need to change the position of the nest boxes many times until you find out what position they like ). babies will drop out of the nest box one by one the first day ,do not worry about them getting hurt in nature they drop 10m (30 feet) or more ,they are super light and fluffy so they just bounce once they fall (actually they need to fall down in order to start eating, they evolved so they will not eat until they drop to the ground in order to avoid eating the dirt and wood shavings in the nest)
do not put them in the same pen with domestic ducks especially mixed mallards because the drakes will mate with the hen until she dies
i used to have some mallards for many years before i got my mandarins and wood ducks , my aviary is 60 square meters but that did not stop the mallard drakes from almost killing my wood duck and mandarin hens(from day one i understood i had to choose between mallards and the rest so i gave away my mallards and only keep mandarins and wood ducks now)
never mix species of ducks that have a significant size difference because larger species will probably try to exterminate the smaller species .evenly sized species can defend themselves from each other. for example there is absolutely no way for a wood duck pair to defend itself against a mallard drake (mallards are at least twice as big as wood ducks and domestic ducks are even bigger)