about sreh's

RC Moser · Wed Jan 18, 2006 9:52 am

one more thing I have discovered, Not every Sreh measures exactly the same. you can get up to .8MM difference. This could be the difference in starlings getting in. If any Sreh is 31 or over 31MM you risk the chance Most Starlings getting in if they are determined. A cheap Plastic Caliper that measures in MM's can acturately measures openings. A must in IMO if you make your own. I also have a go-no go gage made out of 3/8" plywood that I used Mic on to ensure exact height. Two MM's can make a big difference IMO based on my tests.

Guest · Wed Jan 18, 2006 12:54 pm

Hello RC, is 30 mm the best? What thickness of material are you using? Thanks M.H.

Guest · Wed Jan 18, 2006 4:31 pm

I never accurately measured the 35mm film cannister, but when the crescent SREH's were first used this was a quick field gauge. Not the capped end, but the bottom. If it can be slid into the crescent opening without force than you are good to go. The highest point of a crescent should be 1 3/16". This should deny most starlings access to the PM nesting compartment.

RC Moser · Wed Jan 18, 2006 4:41 pm

Hi! M.H. McCormick. Yes 30MM (1 3/16", 1.1875 ) seem to be the standard, Excluders will measure alittle smaller down to 29MM. Anything less than 30.5 MM will work as long as the bumps are around 23MM gap. As far as materials You can use 6" by (as long as you can get in you truck, I fold a long piece in half) siding material or in the "flooring department" of Home depot or lowes there is a 4 by 8 sheet of White vinyl flooring that also works great. 2MM , 1/16" or .055 thick. the flooring material works great just cut it with a table saw, radial arm saw, or skill saw in 4" or 5" strips and as long as you like, mark you hole design and using a rotor Zip saw cut out the hole. the rotor zip saw will want to wiggle around so a steady hand and a sharp rotor blade works good. I cut on the inside of the line and sand or file to the fit I want. You can screw them onto you houses or pop rivet them over metal door covers after you enlarge the holes. Any plastic material 1/16 to 1/8" will work, I also make a go no-go gage exactly 1.1875 to get a correct opening size. My gauge is made out of 13/8" plywood rounded about 2" long. Feel free to ask anymore questions I will be glad to offer my opinions.

Guest · Wed Jan 18, 2006 5:25 pm

Hello, and thank you RC. I am very lucky I live so far out in the country at my colony we may see less than a dozen Starlings a season,I also help take care of 2 colonys in town. The starlings in town are real bad and I am going to make some changes. Thanks again. M.H.