Took on a pigeon job for a non-profit rescue farm. Owner told me over a hundred birds. Oh, yeah, and then some. First night shoot I locked them into one of the barns, and shot around 120 of them. Then set a couple pigeon traps and over time caught over a hundred more. I've shot 10 or 20 each time out for a while. The cages stopped catching for a while so I just baited and left them open for a couple weeks. Reset and caught about 15 more over last week. I'm up to about 333 kills, not including the ones I hit but flew off, probably another 30 or so. They are extremely wary now, but can still shoot a few in second barn at night. This barn is more open, so some fly off after a couple shots.
So, I'm down to approximately 15 birds left. They fly from barn to a dead tree to roost. One shot and they fly back to barn roof.
So, to my question, will a glue board (with cardboard base) hold a pigeon? Was thinking of mounting a 2x4 to the peak of barn roof, covered with glue boards the entire length.
Would most likely only keep it in place while I could monitor it so to avoid other birds as much as possible, and push the pigeons back and forth.
Any other thoughts/ideas?

Yes rat glue boards 24 GRB's will work on the last few if you can get them tethered or stapled to a solid base on their preferred landing and roost areas. I rarely use them, but they work if nothing else does.

Thanks Bob. I've used the tactic for sparrows, but wasn't sure if the bigger birds would stick.

Gotta use the larger glue mats and make sure they are well attached to the base material.

Will do.

Well, bite me Grey. I'm sure you think you're the only professional on the site, but instead of being a Richard, give advice or shut the piehole. I don't like glue boards for anything, but they sometimes have a place in nuisance work whether YOU like it or not. Not looking for your respect, looking to finish up a job efficiently. Any caught birds will be dispatched immediately, not left to linger and die. As said, I've caught or shot around 350 birds so far. I'm looking for options for the last cagey few, if I can't finish them off with cage traps or shooting.

If they are flying in and out of doorways mist nets will work. You can also place them around a feed area.

I haven’t used them for something as large as a pigeon. But I don’t see why it wouldn’t catch them.

Get them out of the net fast, or they’ll really get hard to take out.

Pigeons are very smart birds, for birds. I used to have a problem with them squatting their fat butts in my bird feeders, and hoovering everything till it was all gone. I killed a few with a pellet rifle and in 6 month's time, NO MORE PROBLEM! This was 25 years ago, and the 'Hood still has ton's of birds, especially at the apartments up the road, but they STILL avoid my house.

LT gave great advice. A pigeon trap is a decoy trap. You need pigeons inside of it in order to draw in the reluctant ones.
Trapping pigeons is a complex proposition in my experience. I have been called out to catch 8 pigeons for an apartment complex. I ended up catching 185 pigeons. Pigeons span far and wide in search for food.
Once they ran out of money for me, there were 6 pigeons still there. Where they the same ones which prompted the initial call? I don't know. Probably not. More likely they were students of Charles Darwin and decided traps are a bad idea.
Furthermore, glue traps are nonselective. You will open yourself up to a serious fine from the USFWS if you catch a species of concern, let alone threatened or endangered.
If you are using cracked corn, change over to "pigeon food". It works better for picky eaters in my experience.

Maybe you can put the trap with live female birds, that you have rotated using the state laws, by a AC unit condescension drain pipe????.....(water is your friend in summertime bird control)

Thanks guys. Yes, I had decoy birds in the cage trap, until we got the heat wave. Vinke, good idea. The water was certainly the reason to remove the birds daily.
Just to be clear, the glue board question was just that. Trying to think outside the box. I caught another dozen and shot 8 or 10 more of the "15" that were left, lol.
Now we're only seeing 11 more. I'm thinking new ones are arriving.

Good pigeon habitat is good pigeon habitat. It’ll attract new ones.