Protect wild birds from windows
Birding enthusiasts share a similar problem: wild birds fly from backyard trees and feeders into home windows where they die. Tragically, tens of millions of wild birds die in this manner each year.
Now you can help reduce this loss of life.
Decals available in three attractive designs...Maple Leaf, Butterfly and Hummingbird CLICK HERE to BUY
WindowAlert is a high-tech decal that may be applied to home and office windows. Each decal contains a component which brilliantly reflects ultraviolet sunlight. This ultraviolet light is invisible to humans, but glows for birds.
WindowAlert decals help birds "see" windows and thus avoid striking the glass.
WindowAlert decals are in the shape of a maple leaf, butterfly or hummingbird (pictured above). The decals are four inches wide and are static-cling. They easily attach and peel off window glass.
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Here are three ideas to help you when placing your decals:
1) Bird strikes often occur when birds can see through one window, across the inside of your home or office, and out another window. In short, they think they can fly through your home or office. In this case, position your decals to block this line of sight.
2) Bird strikes occur when birds see open sky reflected in your window. This may occur, based on sunlight and the time of day, in certain windows of your home or certain areas of a large window. Use the decals to break up this reflection of open sky.
3) Male birds often stake out a particular territory. When they see their own reflection in your window, they mistake it for an intruder and attack. This is particularly true of the Northern Cardinal. Place the decals on the window under attack.
- One every two or three square feet across the glass (the more decals the better).
- On the exterior side of TINTED glass.
- On the exterior side of CLEAR glass (interior possible, but MUCH less effective).
- For maximum UV reflectivity, replace decals every 2 years.
Facts About Bird Vision
Birds enjoy sharper vision than humans. Birds can see certain light frequencies--including ultraviolet--that humans cannot see.
In fact, many songbirds have feathers that reflect ultraviolet light. This light is used to communicate species, gender, and perhaps even social standing. Birds can see this ultraviolet light under normal, daylight conditions. Humans require the assistance of a black light.
Why do birds see better than humans?
1) Both birds and humans have photoreceptive 'cones' in the retina located at the back of the eye. These cones allow us to see color light. The human eye contains 10,000 cones per square millimeter. Songbirds, for example, have up to 12 times this amount or 120,000 cones per square millimeter.
2) In humans, these photoreceptive cones consist of three types. Each cone is sensitive to red, green, or blue light. This is called trichromatic color vision. Birds have an extra cone for quadchromatic color vision. This extra cone expands the visible light spectrum, allowing birds to see ultraviolet frequencies.
3) During low-light conditions, both humans and birds rely on photoreceptive ‘cell rods’ in the retina. The human eye has 200,000 cell rods per square millimeter. Some birds, such as owls, have up to 1,000,000 cell rods per square millimeter.
4) Bird eyes, on average, account for 15% of the mass of the bird’s entire head. Human eyes, by contrast, account for less than 2% of the head.
Note the size of the eye socket relatibe to the skull!
5) Bird retinas, in contrast to humans, contain no blood vessels. This prevents light scattering and thus provides birds with greater visual acuity than humans.
In sum, your favorite songbird will notice WindowAlert decals the MOMENT you place them on your window!