The other riders told me its an "emu"
It looked like a genetically mutated ostrich to me.
This thing is hanging out at the rangers station at Cedarville. Its been there a few days atleast so we're pretty sure it escaped from somebody's farm. If you go towards it, it'll walk towards you and make a wierd "thumping" sound that sounds like a drum. 2 or more walk towards it and it walks away.
We found this out when getting a soda outta the machine after the ride. Its got some nasty looking claws so we made trips to the Coke machine in teams.