REUTERS/Brian Snyder

Firefighters worked to rescue a deer trapped on the thin ice on the Cambridge Reservoir in Waltham.

David L. Ryan/Globe Staff

The deer was transported by sled to safety.

David L Ryan/Globe Staff

Mark Vogel of the Animal Rescue League (on the sled) was among those who tended to the deer.

Bill Greene/Globe Staff

Rescue workers pulled the sled.

David L Ryan/Globe Staff

The deer was placed in a boxed container.