Hawk silhouettes, shot from inside.
After marking recent bird strikes with blue painter's tape, I stenciled hawk silhouettes on the
outside of my living room window (which is directly east of the bird feeders). I'm not sure if the bird-of-prey shape is as important as simply
disrupting the reflective surface of the glass, but the shape should be on the
outside of the window.
The shape I used is based on a
Window Hawk design by
Visible Ink. I'd bought a pair of their clingFilm window stickers years ago, from an
Audubon Society store in Oregon. Other hawk shapes to base stencils on are available online from The National Wildlife Federation (
Make a Hawk Silhouette), and Hawk Mountain bird refuge (
Helpful Hawks -- a particularly nice publication, in PDF).
UPDATE: 15 January 2015
None of the objects I place on this window ended bird strikes, least of all the Audubon Society's predator-bird silhouettes. New research suggests that hanging vertical cords may be the better answer: see
Field tests show parachute cords deter bird-window collisions. The researchers note, “The effectiveness of vertically hung parachute cords to deter bird collisions is attributable to the critical spacing (3.5") between cords, and also as important is the placement of the cords over the surface facing the outside.”
[Thanks to
"BirdSaver" by Henge on the Instructables website.]