If you do the math on the ability of this species to reproduce (2-3 nestings with 4-7 chicks per nesting) and the average life span (roughly 12 years), you realize how eliminating one breeding pair has the potential to have a tremendous benefit on species diversity, even within a small area. Kate: Sounds like you have had a lot of success. The Huber trap is a great idea. There are also others that are nice. Here is the web site for one: http://www.vanerttraps.com/universal.htm You may be aware of this, but I just think this caution bears saying for those who are reading: The one problem with putting in-box traps in a bank of martin houses is that you are likely to trap native birds as well. You have to monitor these kinds of traps hourly (which might be hard given the height of them) to make sure that the trapped bird is the intended target species. If it is not, you actually risk the life of the native bird(s), which, of course, is illegal as well as inhumane. So monitoring is absolutely essential. I would agree with everything else that you have mentioned. Certainly the males are the ones that control the area and have the most potential to harm native birds through passive and active competition. Most people who do this would agree that one of the best ways to catch them is with in-box traps during the heat of the nesting season. They are very saavy about ground traps. You can sometimes bait the ground traps with nesting materials that are glued to a heavy piece of wood (ripped plastic tarp material, trash, tissues, yarn, etc.). The best season to catch the adult males (and females) is the early spring. During the summer, it is best to use a ground trap baited with white bread. You can catch young birds and females by the dozen this way. I have included a link for a very good repeating ground trap. Good luck to you Rose. I think that everything here is really true and if more people would consider doing a small piece of this big problem species diversity could be noticably improved. Of course, this is all contingent on the laws in Canada. Here is a link that might be useful: Repeating Ground Trap

I went out today to check the TRES house to see if another egg had been laid. As I stood next to the house, I could hear the Mother flitting about inside. So I knocked on the side of the house to see if she would fly out. She stuck her head out and looked right, then left where I was standing. She staired at me for maybe 30 seconds (as if to say, "yes, may I help you"). She disapeared back inside. Again I knocked. She stuck her head back out and looked straight at me for another 20 to 30 seconds. She went back in, so I opened the box and looked in with my mirror. She was hunkered down on those eggs and nothing I could do was going to pry her off. She had some real moxie, some real chutzpah. I closed the box and walked back to the house. I am still smiling and laugh out loud every time I picture this in my mind. Can you imagine the nerves of steele it took for this little bird to protect her eggs from this big hulking monster (me) looking at her and her eggs. What an inspiration and life lesson these little birds can teach us. Phil

They are no different in Europe than anywhere else. It is true in the animal world it is hard to find a species that's completely innocent. Bluebirds will also kill and take over a nest if they have too. Barn swallows can do the same. I can give you a link with a story about swallows sealing a nest that a sparrow took over, and they sealed it with a sparrow inside (but the link is not in English). Swifts in Europe often take over a nest by killing the birds with its claws. The american cowbird is an angel compared to the European cuckoo bird :) I could continue with these kind of stories forever. Any way, I don't have a problem with your or anybody else's advise, but you should list all the possible solutions, not just YOUR favorite.

Hi juanital: great swallow picture! But, birdhouses should be mounted on a small diameter pole with a cone or wobbly hanging PVC baffle baffle for predator protection... a snake, raccoon or squirrel can easily climb up that post and reach in to eat the contents... its cheap to buy and install the PVC baffle. Since you provided a home for these birds, its cheap insurance to see their young lives continue outside the box. Here is a link that shows the baffle: Here is a link that might be useful: predator baffle