Keeping blinds or shades drawn, or putting up a curtain inside rarely solves the problem, unless you are dealing with the corridor effect. If the problem is the reflection on the exterior of the window, changes inside won't help. There are a number of options to prevent birds from striking windows. (See bluebirds apparently alerting hosts to problems.) some bluebirds are just "nosey," and will cling to a window screen or will come to the window to beg for mealworms, but do not crash headlong into it.During the fall, male birds often get a second flush of testosterone (called "gonadal recrudescence"). Territorial window strikes are more common in springtime, but may occur year round. Bluebirds, cardinals, and robins typically do this. are attempting to defend their territory from a perceived intruder - their own reflection ("territorial strikes").see a reflection of the outdoors, and try to fly through what looks like unobstructed open space (the "mirror effect"), or.cannot see the glass at all because it is transparent (especially a problem with two windows or a window and mirror opposite each other, creating a "corridor effect").Window strikes are reportedly the most common cause of death associated with bird feeders.īirds collide with glass for four reasons: either they: 25% of North American and Canadian bird species have been documented striking windows. According to David Malakoff ( Audubon magazine, March 2004), window strikes kill between 100 million and 1 billion birds in North America each year, particularly migrating birds. Birds may be injured (fractured bones or bills, head trauma, internal bleeding, broken beak), killed, or eaten by a predator while stunned. This behavior is not just annoying or messy. I had a female robin engage in this behavior, and if it weren't the State bird, I think I would have hired a hit man. They may leave streaks of droppings on the glass. The banging can start at dawn and last until dusk, for weeks on end. Breeding adult birds, both male and females, and juveniles may peck or hit glass panes. Migrating birds, or birds startled at feeders or bird baths may crash into windows. Quick Tips: To prevent bird strikes, do not place feeders near windows or move them closer (1-3 feet away) or farther away (25-30 feet.) Break up the reflection with fruit netting or CollidEscape window film. Preventing Window Strikes Bluebird and Small Cavity Nester Conservation
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