Wing

[Pigeon]

And remember a 4" board is actually 3 1/2" as cut. 

[von Humboldt]

While Charlie does know all things Southern Birding and articulates them in a witty, humorous way, his knowledge of decking does not appear to be as extensive. Most all pressure-treated decking today is 5/4" X 6" (actual dimensions 1 x 5 1/2). Unless the OP tells us differently, we should assume that decking is 5 1/2 inches wide. 

Edited August 14, 2021 by von Humboldt
typo

[Charlie Spencer]

4 minutes ago, von Humboldt said:

Unless the OP tells us differently, we should assume that decking is 5 1/2 inches wide. 

My neighborhood must be full of unusual 3.5" planks.  I did mention the option of 6-inch width, although I didn't clearly indicate such was really 5.5 wide.

Either way, do we agree this is a small wing relative to the plank, too small for pigeon / dove?

[Seanbirds]

16 hours ago, von Humboldt said:

While Charlie does know all things Southern Birding and articulates them in a witty, humorous way

Best description of @Charlie Spencer’s Whatbird experience I’ve ever heard. 

[Charlie Spencer]

16 hours ago, von Humboldt said:

While Charlie does know all things Southern Birding

Yeah, that’s a gross exaggeration!