Killing them with bb airguns if fun but messy, also I felt remorse about killing the first one until I realized I ate 10 chicken wings.

Do owl decoys work?

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Yes!
Well, Owl Decoys work on boat docks.

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I don't get the part about the chicken wings.....too late in the day I suppose, lol. You could get a couple of cats maybe.....

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Would ultrasonic devices work? Like the ones that are supposed to repel mice and there are others that repel deer. Maybe some kind of offensive smell repellent ? A hawk would likely be a natural pigeon repellent.

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Setup Home: Direct TV since 2001
75cm Dish w/ single LNB for 74West
Orion 75 cm Dish dual LNB for 97West
World Direct Dish single LNB for 72West
WS7630 75cm Dish single LNB for 103West
Fortec, Viewsat and Visionsat receivers

* Avatar is Macy's Satellite Network on 105W.

>>>> Everyone should look into upgrading their OTA capabilities and get a deep fringe outdoor antenna ( with a rotator) and use a 30 db MAST MOUNTED amp. This adds a new dimension to the meaning of "FTA".

If you can find a plastic or rubber snake about 2 foot long, that will give them something to think about. Worked for me when I put one in a shade tree where I park one of my vehicles during the summer.

The snake and owl/hawk sound like winners, but that won't stop me from brainstorming up another idea: -

How about a motion sensor hooked to a solenoid valve for a sprinkler by the dish.?.
Birds fly in, birds gets sprinkled.

Just remember to turn off the defenses before YOU approach.
... and ya might want to think about whether it should be on a timer for daylight-only sprinkling (?)

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Hot Foot. There is a product that comes in a caulking gun cartridge that has Cayenne pepper in it. Apply to roosting areas. If for Gulls, there is metal garland material that has sharp points.

Lived on a boat for several years that had a covered slip. After awhile the snakes and owls don't work.

Dish pooping pigeons? Whooaa! I'd get to shelter first, even a small dish could hurt like heck if it hit you!

Ha! Seriously, do they roost on the dish and make a mess, or are they roosting above and your dish just happens to be located below their nest?

If they are landing on the dish, they surely are most likely sitting on the prerimeter of the dish or on the LNBF or the support arms. Could you adorn these areas with some obstructions to deter them from roosting there? Like wooden, glass or decorative plastic spikes on the upper perimeter of the dish? You could make it look decorative and the pigeons would find it hard to roost on them.

If their nests are above, and especially if far above or dropping aerial bombs, there probably isn't much you can do besides eliminate the pigeons or shelter the dish.

You might be able to coat at least the dish reflector with something to make it easier to clean.

I keep waiting for a buck whitetail to use my dish for a rubbing post, but fortunately, that hasn't happened yet.

RADAR

Maybe ya just need to install an appropriate Owl-perch... one that attracts owls. -

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That is an awesome picture, Anole. I actually had an owl as a pet once a few years ago, for about a day. A male Great Horned owl. It flew up out of a ditch and a passing truck hit it and broke its wing. I took it to my cabin and let it poop all over before I took it to a raptor recovery center.

I had him riding in my truck as I was driving down the highway, not in any cage or box. He jumped up on the passenger armrest and was lookiing out the window when I passed a semi. I just about caused an acccident as the truckdriver kept staring at my "pet"?

Does he bite? No, but he's a real hoot! LOL

RADAR