This came from a friend. It mentions God’s creation but I think the project is secular, so use it how it suits your family. It does indeed have a link for homeschoolers and it also mentions doing this as group projects potentially. I think anyone can participate as well, not just homeschoolers.
The following is from another loop.
There is an awesome research project going on each winter through
Cornell, and they need the help of people all across the US. For $15,
you get a feeder & kit, then you count the birds in your yard twice a
week during the winter & submit the data. It gives you something fun to
do, while learning about nature & science (even math) with your kids,
and helping scientists gather data. Their website provides all the info
and even a homeschooling link for those of us homeschooling. It
includes a free science module to use to supplement your curriculum.
Just another neat way to learn more about God's creation. Here's the
link: http://www.birds.cornell.edu/pfw/ and be sure to click on the
homeschool/education tab too!