Stopping window strike- help

To: <>, <>
Subject: Stopping window strike- help
From: "Hugo Phillipps" <>
Date: Thu, 11 May 2006 21:43:43 +1000
Michael -

I had to deal with queries like this all the time when I worked for Birds Australia.

Most bird-strike-on-window problems seem to happen for three reasons:

1. Glare from internal lights at night dazzling the birds (probably not applicable in your case but a big problem with office lights in big cities at times of mass migration at night).

2. Invisibility - when the birds see an apparent clear passage through the house to the other side. This can be fixed by barriers such as blinds blocking the view through.

3. Reflection - when the window reflects the sky or space between vegetation so giving the impression of a clear passage. This also causes problems with birds seeing their reflections in the glass and expending much energy in attacking their perceived rivals. This cannot be fixed by internal barriers; you need external ones such as Merrilyn's suggestion of fly-wire screens, or a layer of grime (or speckling of thinly sprayed paint) to cut the reflection. Even if the windows are not washed externally, rain can still keep the exterior surface reflecting well. Storm's suggestion of shading should help by cutting sky reflection. Or you need something to block the approach to force any would-be fly-through visitors to slow down sufficiently to either see the window or, at least, minimise impact trauma. For the longer term you could plant a shrub or tree to block what might seem to a bird to be a nice clear flight-path.

It is often only one or two windows on a house that present a bird-strike problem, for reasons particular to those windows. In my experience #3 of the above reasons is more common than #2. The sometimes advertised or recommended raptor silhouettes, that one can buy or make to stick on the inside of the window to prevent bird-strike, are totally useless for #3 and usually not particularly effective for #2.


Hugo Phillipps
Queenscliff, Vic

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