I was riding the Marin headlands loop this morning and while climbing at about 8 mph I had a very young fawn come out the brush on my front left and trot down the road toward me. The fawn kept coming until I said something when it got about 10 feet away. It then ran in front of me up the road for a bit until it saw it's mother on the hillside to my right and went up to her. The only explanation I can think of is the fawn thought I was its mother until I said something and it realized I wasn't a deer. Made the climb interesting for a while.