What on earth are these?

Another photo taken in 2009 in coastal Maine. I had no idea what these things are, so I sent the photo to my sister-in-law Ann, who lives in Maine. She asked her friend Janet who said they are....

[katy]

This makes a fabulous photo especially when viewed on black! You captured some nice strong color in this one.

[aikiuser (jenn)]

Construction stands/supports of some sort? Hmmm, enquiring minds want to know!

[aikimomm (phoebe)]

Colors and patterns and mystique, oh my.

[Dione Giorgio]

Cool shot and patterns.

[Ann H. LeFevre]

...interesting. Well, I checked out the answer before typing here but they really did arouse my curiosity. You really can't tell how big they are in this shot but in the answer shot the size is surprising! I like the random stacks and colors here. Good catch!