Abstract: A collapsible duck blind for attachment to a boat, being fully adjustable for both width and length to accommodate most conventional boats. In a preferred embodiment, the blinds include four hinged support legs, each having a foot securable to a surface of the boat and an upper end attached to a frame having a pair of movable support structures on either side thereof. A cover is provided for concealing the duck blind and the hunter(s) positioned in the boat, a portion of the blind being movable with the support structures between call and shoot positions. With both support structures lowered to their shoot positions, the hunters' unobstructed range of shooting is a full 360.degree.. With both support structures raised, the hunter is adequately concealed but can still visibly track ducks or other water fowl through a central gap in the blind.