I have noticed purple bags hanging in the trees on Rt 77 in Ohio. What are they for?

Question

The bags are all purple, but vary in design. They are spaced quite a distance apart. They have also been seen on Rt 62. What is the meaning?

Answer 1

The returning Purple Martins silly.

Answer 2

I just came through Ohio today and also noticed these purple bags.  I googled 'purple bags in Ohio' and this is where I found the answer:

http://www.daily-jeff.com/news/article/3...

And for a more detailed description from the Ohio Agriculture site:

http://www.ohioagriculture.gov/eab/FAQS/...

Hope this helps!