Well, it started as a simple study of birds for science as part of our My Father's World curriculum
Exploration to the 1850s .
We looked at feathers under a microscope.
Then we drew diagrams of a birds digestive system.
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| This one is Joish's |
We learned that the bird's crop allows it to eat alot of food really fast and then the crop sends the food to the stomach at a steady rate. The stomach breaks down some of the food, but the gizzard does the grinding. Some birds eat things that cannot be fully broken down like bones, fur, and even some seeds and beetle casings. These form a pellet, which the bird expels through its mouth.
Okay, are you grossed out? Well, anyway, I decided to order 3 such pellets. These came in the mail, and as a reward for finishing all school work for the week, the kids and I got to dissect them. Theron and Josiah worked as a team.
But before we did that, each of us tried an online dissection to help us get a feel for what we would be doing.
It's a cool site. You can find it at
www.kidwings.com . It can be used as a prerequisite to the actual dissection or as a cheaper, less messy and easier alternative. We are going with the former this time.
We were ready to be "real" scientists! We carefully opened the foil-wrapped pellets, measured them, and inspected them. We determined that they are most likely from a barn owl by referencing our DK book on birds.
Next, we used toothpicks and tweezers to break apart the pellet and see what's inside.
There was alot of fur, tiny bones, and each pellet had at least one skull and a set of jaw bones.
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| This was my first exciting discovery - a jaw bone! |
It was very tedious work and took alot of patience, being careful not to break the small bones. The interesting things we noted were that my pellet had alot of dried grasses in it. Hannah's had black fur as opposed to the gray fur of the others.
It took a good hour or two to complete. We were so tired. We tried to identify all of the different bones. They were all from some type of rodent.
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I laid my bones out on the diagram provided. Notice the huge skull and jaw bones with one really overgrown tooth.
In front of the huge skull is a tiny skull and jaw bones along with some leg bones.
The pelvic bone probably goes with the smaller skull also. It seems a bit small for this big fella.
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These are Hannah and Josiah and Theron's trays. There are some nice bones in there, too. Now, to just get them sorted. Wanna give it a try?