After studying and making deer images for few days, I tried Haartraining several times, but there was bunch of errors. It’s hard to know it’s right or wrong. After struggling days, I got a haarcascade, but it didn’t work appropriately. However, I got a possibility detecting deer. You can see a big square cover a deer in left bottom image. Thus I could keep challenge Haartraining.
Also I tested with walking deer video, it works well.