The Van Ert in box trap is just a few dollars. Check out the www.sialis.org site and look under traps for Mr VanErt's phone number. He will send you one right away.

This is the trap I use in box,works very well,and easy to make.see link below

Here is a link that might be useful: sparrow trap inbox

The Van Ert, for inside the nestbox, is to trap one at a time inside the nestbox. If you have HOSP harassing nesting bluebirds, you might want to try that in a mobile nestbox (see the link below).
Ground traps are worth the investment if you have a lot of HOSP in the area. Or if you are handy, you could make one. Bet's web page provides links to several types you can buy or build.
Also on Bet's web page below are other solutions you might want to try.
Best of luck!
BlueBars

Here is a link that might be useful: http://www.sialis.org/hosp.htm

I know the DRST Deluxe Repeating Sparrow Trap is expensive, but I've heard from others that other traps have birds that escape and aren't as effective. I do know of people on the songbird family forum that have made their own sparrow and Starlings traps.
Tammy

I paid $60.00 for one years ago and never caught a single bird. Now, since I can't figure out how to use it - duh, ordered a DRST. If it works, believe me, it's worth it. Money well spent isn't a waste. Opening a box to find dead fledglings, courtesy of a HOSP, is worth the investment. That's what it is, an investment.

Linda

The only bird that I've caught in my ground repeating trap is Carolina Wrens. I've released them. The sparrows are not attracted to it at all. They love the Purple Martin house. I have two traps there and have caught 5 HOSP this year - 4 males and 1 female.

Linda C