I live in Central NY and it is well into the off season and just on the tail end of winter (hopefully). I have a question about deer herds and why. I' ve noticed the only time I see deer during the winter, especially lately with slightly warmer weather, that they seem to be in huge herds. There' s been evenings where I would see 30-40 deer together. I faintly remember hearing something about them herding up. Is this true and if so ...................... why? Is there a scientific reason for them doing this?