Or, you can cut out the boxes above and paste them into their proper places below. When it gets cold, birds eat more frequently to store up fat. The fat provides energy to help keep the birds warm. Deer and rabbits share the same diet during the winter months. They eat mainly twigs and bark in January, but both of them switch to eating poison ivy in February.
Nobody knows for sure.
It may be because the poison ivy somehow becomes more nutritious, or it may be because they run out of other foods they like better. You can tell whether a deer or a rabbit has been chomping on something by the bit marks left behind. Rabbits bite all the way through, while deer bite halfway through and pinch and pull the food off causing an uneven break. That's because rabbits have front teeth on both the top and the bottom, while deer only have front teeth on the bottom. The animals that stay here for the winter are most active in the afternoon, when the day is at its warmest.