An anti-bird cover for a watercraft uses planar sheet of plastic netting with a small, but not micro, aperture to deter birds from perching. The aperture is formed by a plurality of filaments and knots. The filaments are between 0.25″ and 2.00″ in length, with the illustrated embodiment having filaments of 0.75″. The plastic netting is formed from nylon, polypropylene (“PP”), high-density polyethylene (“HDPE”), and low-density polyethylene (“LDPE”). The perimeter of the netting is encircled by an elastic gather with two free ends. The two free ends of the elastic gather are captured by a bungee cord stop. The surface area of the planar sheet of plastic netting is 1.5 time the surface area of the watercraft to be covered, in order to make the present invention billow in the wind, thus deterring birds from perching.
