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Why buy one if you can make one?

For years, Bluebird landlords have been using makeshift "Sparrow Spookers" as a deterrent to House Sparrows entering nestboxes where Bluebirds had begun nesting. These have proven to be extremely effective for protecting Bluebird nestings during the egg-laying, incubating and nestling period. Sparrow spookers can be readily home made, but it is a bit tricky to put the pieces together, get the horizontal pieces at the right height, and keep the mylar from coming off. It can also require some manuevering to mount them so they don't fall over or twist in the wind, and so the mylar brushes the roof top like it's supposed to. Nestbox designs vary widely, and the Spooker should be positioned carefully on the nestbox to be effective. In addition, home made ones tend to not weather well. Finally, some folks just aren't handy, and wanted a ready-made spooker that could quickly and easily be mounted on any box style "chosen" by a bluebird. But because of the challenges involved in creating a spooker design appropriate for many different nestboxes and mounting configurations, a commercial version of the Sparrow Spooker has not been available for purchase - until now!

The Universal Sparrow Spooker was designed to be infinitely adjustable for any nestbox size or style, and any mounting configuration. The design allows for both vertical and horizontal adjustment, as well as allowing for infinite adjustment of the angle of the "V" rods from which the mylar streamers hang. Constructed of sturdy yet lightweight weather-proof materials, the Universal Sparrow Spooker will give you years of service. All metal hardware included is made of stainless steel for corrosion resistance.

Unit comes with two mounting brackets for situations where you have two nestboxes for the Bluebirds to choose from. Simply screw a bracket onto the back of each nestbox to make it "spooker ready". When the female has made her choice, and the first egg is laid, you can quickly and easily insert the vertical rod into the mounting bracket with a minimum of disturbance to the Bluebirds. Additional mounting brackets are also available.

The Universal Sparrow Spooker is shipped with a 25-foot roll of 3/4" mylar, from which you can cut the streamers to your desired length, then quickly snap them into place with the included clips. The mylar provided should be enough to replace the streamers on one spooker several times. 25-foot Replacement rolls of mylar are also available here.

Installing a Sparrow Spooker is an essential line of defense against nestbox predation by these invasive, non-native birds, who can quickly ruin a Bluebird nesting, destroying eggs, and killing or mutilating helpless nestlings or adults inside the box. The Spooker doesn't take the place of trapping and removal of House Sparrows from the Bluebirds' environment, but it can act as an additional layer of protection for your Bluebirds during their vulnerable incubation and nesting period.

The body of the Sparrow Spooker must be installed in the mounting bracket only after the first egg has been laid, to avoid scaring Bluebirds away from using a box. However, once the birds have chosen a box and are committed to a nesting, it normally takes only a few minutes for them to accept the spooker. In fact, there are no documented cases of Bluebirds abandoning a nesting because of the addition of a spooker. The Spooker should be left in place all during the nesting process, but should always be removed after fledging. Leaving Spookers in place between nestings is strongly discouraged, as not only could it potentially discourage the Bluebirds from re-using the nestbox, but it may also result in the House Sparrows' becoming too acclimated to the Spooker, thereby reducing its effectiveness during subsequent nestings. The mounting bracket can be left, however, making it easy to pop the Spooker back in place if the box is chosen for a subsequent nesting.

The Universal Sparrow Spooker is the answer to many Bluebird enthusiasts' requests for a sturdy, weatherproof, adjustable, easy-to-install Sparrow Spooker. Click here for purchase information.

    Nestboxes used in demonstration photos courtesy Wild Birds Unlimited, Waite Park, MN.

Here are some hints on Sparrow Spooker use from Sialis.org, another website dedicated to Bluebird education.

• "By putting the spooker up after the first egg is laid (usually before 1 p.m.), you will have confirmation of acceptance (and will not have to worry about interrupting incubation), as long as a new egg is laid the next day. You will also be protecting the nest while it is unoccupied, since the female does not begin incubating the eggs until she finishes laying all her eggs.
• If desired, observe the box after installation. In my experience, the female usually accepts it almost immediately--it may take the male 10-30 minutes . . . It would be very unusual for a spooker not to be accepted within an hour or two.
• Avoid installing the spooker when it is very windy, as this may delay acceptance. If they don't seem to accept it right away, leave the spooker up but take a rubber band and bunch the streamers to the top post out of the way. Then let one or more of the streamers down every day to desensitize them."

And a few more from BluebirdNut.com

• [Don't install the Spooker] until after the first egg is laid. The Bluebird may seem reluctant to enter the box when it first sees the Spooker, but it usually takes only a few minutes before it gets up its courage to enter the box. It is best to install the Spooker when you have a little time to monitor activity at the nestbox. Watch to make sure the Bluebirds accept it. During egg-laying, the female is not in the nest all day, so it isn't critical for her to accept the Spooker instantly. The best time of day to put the Spooker on is right after that day's egg has been laid, usually in the morning. Then the female has all day to get used to it before she must enter the nestbox to lay the egg on the next day.
• Take the Spooker down as soon as the babies have fledged, at the same time you clean out the nestbox. You will want to put it back up again for a second or third nesting, again, after the first egg of the clutch is laid.
• Due to a number of reports of Sparrow kills in TRES boxes in 2004, some experimentation has been done for the past three nesting seasons with using Sparrow Spookers on nestboxes where Tree Swallows were nesting. Evidence suggests that Tree Swallows will also accept Spookers.

And remember - no matter how effective a Sparrow Spooker may be:

 "A sparrow spooker is an invaluable tool to protect nesting bluebirds. However, nothing besides trapping and elimination is foolproof." Sialis.org

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