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

Our TRES returned earlier this week, I think Tuesday. Yesterday a pair of Blues started house hunting, checking all the boxes. Apparently one of the TRES pairs has made thier decision on a nestbox already as there was a big fight this morning between the Blues and the TRES when the male Bluebird approached this nestbox. One of the TRES took him to the ground, the female Bluebird came to see what was going on and the other TRES attacked her. The TRES returned to the nestbox and the Blues to a tree nearby. The Blues did not try to go back to that nestbox but have been checking out a few others on the other side of the yard now. They have plenty boxes to choose from right now, until all the TRES return that is, they get kinda thick around here. Donna

Update: they finally stopping fighting on the 8th day, May 6. I heard Tres making noise in the morning of May 6 and looked outside, saw male bb and TRES as expected. But, TRES didn't dive bomb bb as before, they just stared at each other, sometimes just 8 ft apart. No fighting the whole day, bb hang around for a lot longer period of time that day. May 7th, bb rarely showed up. TRES carried a few straw to build nest, then stopped. Today, rain. No activity The way they are going about building nest, I don't think they will ever finish:-(

Yes, I get mobs of TRES and I worry each time they will ovewehlm the other birds but they don't. In my yard I have two boxes paired (about 30 feet apart) on the east side of the house, then in the back yard I have two boxes paired on the west side of the house and in the front yard I have two boxes paired on the west side. The boxes on the east are sortof in sight of the boxes in the back west side (a big tree is inbetween) and are about 68 yards from them. The pairs of boxes in the front west are in sight of the boxes in the back west and are about 64 yards apart. I normally have three or four pairs of TRES nesting and a pair of Blues and sometimes a pair of Dees too in our yard. Then I have three boxes at the back of our lot, not in sight of any of the yard boxes and are over 100 yard away from the yard boxes, these normally have two pairs of TRES and one pair of Blues. Then about a half mile away is a park where I had five (now seven) nestboxes. I normally have two or three pairs of TRES and a pair of Blues, may be different this year with the extra two boxes. So as you can see we have lots and lots of TRES in the area. They were mobbing the Blues yesterday but mom is incubating what I think are five eggs so I am not too worried about the TRES this year since the Blues are so far ahead. Weather has been pretty cool here lately so the TRES aren't real serious yet. Last year the TRES kept chasing away the Dees from the paired box (TRES wanted one and the Dees had started a nest in the other). I added a sparrow spooker and the TRES just used it as a perch. The TRES didn't deter the Dees at all though and once the Dees laid their first egg, I added a wren guard. By this time the TRES were nestbuilding so they weren't worried about the paired box anymore. Good luck, hope yours Blues renest! Donna