Over the years we have had many requests for info on how to stop
birds hitting windows, so this may be of interest to people who have
not seen it on Birding-Aus. The paper's abstract reads as follows:
Birds behave as if clear and reflective glass and
plastic windows are invisible, and annual avian mortality from
collisions is estimated in the billions worldwide. Outdoor flight
cage and field experiments were used to evaluate different methods
to prevent collisions between birds and windows. Stripe and grid
patterns of clear UV-reflecting and UV-absorbing window coverings
presented an effective warning that birds avoid while offering
little or no obstructed view for humans. Birds used UV-reflected
signals to avoid space occupied by clear and reflective sheet
glass and plastic. Window coverings with effective UV-reflecting
and UV-absorbing patterns as warning signals can prevent
unintentional killing of birds from collisions with windows.
One-way films that made the outer surface of windows opaque or
translucent were successful in deterring bird strikes. Ceramic
frit glass consisting of a visual pattern of densely spaced
0.32-cm diameter dots, 0.32 cm apart was an effective collision
deterrent. Uniformly covering windows with decals or other objects
that are separated by 5 to 10 cm was completely or near-completely
effective in preventing strikes. Twice the number of window
strikes occurred at non-reflective sheet glass compared to
conventional clear panes. Continuous monitoring of windows
revealed one in four bird strikes left no evidence of a collision
after 24 hrs and, without continuous monitoring, 25% of bird
strikes were undetected.
I wonder if we can buy clear UV-reflecting and UV-absorbing window
coverings in Canberra?
Cheers - David
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