In this article, we continue to cover cases involving open structures. In the first case, we
looked at parking garages, both above and below ground types. Here we are
addressing any open air structure, i.e., one with a roof, but one which may have only
one or two permanent walls. Examples might include outdoor patio restaurants or
bars, gas stations, outdoor music or theatre stages or concert areas, warehouses or
manufacturing facilities, barns or farm animal facilities, docks or other covered
boat/car/RV parking or maintenance areas, etc.
Due to the open nature of these types of structures and facilities, the primary goal of
bird repellers here is to preserve property and facilites by ensuring that absolutely no
nesting occurs and that general roosting and perching is also strongly discouraged.
You will need to examine your facilities first to find potential nesting areas. Ledges
created by intersecting beams, lighting or sign fixtures, electrical, piping or other
infrastructural support systems need to be identified. The two bird repellent tools that
you have available to keep nests from these areas are bird netting and bird spikes.
Keep in mind the types of birds that you may need to deal with. Swallows, for example,
can build a nest in the corner of a vertical surface that meets a roof or other wall. That
may require netting in more places that if you were dealing only with sparrows or
pigeons. Bird spikes will suffice in those cases to keep bird off of flat surfaces.
Once you have dealt with the obvious problem areas for nesting, you should move on
to consider the overall access points for birds. Crowds and traffic and loud equipment
noises will keep birds away only for so long, especially if food is available, such as at
an outdoor bar or restaurant, or in a barn or farm facility.
Look for good ultrasonic bird repellers that are designed for enclosed or semi-
enclosed spaces. Ensure that it will have enough power and speakers to cover the
area effectively and yet is safe for any people that may work in the area.
For heavily peopled areas, several lower powered units may be better than a single “blaster”
system. Even though the units operate in ultrasonic frequencies, units capable of
keeping a huge barn, hanger, or docking facility may put out enough decibels that
humans could be effected even without hearing the sound. The key factors here are
decibel level produced, the length of exposure and the proximity to the unit. (Prolonged
exposure within 10 feet of such devices is not advised without ear protection such as
When first deploying your ultrasonic bird repeller units, consider the need to possibly
blanket the internal area first to remove any existing problem, then adopt more of a
perimeter defense arrangement to keep birds from entering a facility. Look for units
that can support a 360-degree coverage for the internal space but also employ
directional speakers for covering entryways and such.
For challenging situations, you may need to utilize visual scares as well. This can
range from predator type visual scares to distractions like holographic tape, flashing
lights or even indoor laser light systems to disorient and chase away birds. In
situations where bird spikes might not be practical, such as within smaller roofed
covered structures like patio coverings, there are also long lasting, non-toxic, tacky
substances that birds will avoid. This is often easier to apply in and use in tighter
spaces that sparrows or finches might find while looking for a crumb or two.
You can find these types of products at Bird-X Bird Control Products, the industry leader in humane
bird control products since 1964.