As the late fall temperatures drop below 30 degrees, the Peregrines start to spend more time at the nearby Verizon Cell Tower near the corner of Hampshire and Canal Streets.  They tend to perch on the fifth and sixth floor ledges located on the south side of the building.  These ledges are next to hot air exhaust vents.  These vents provide excellent heat during the colder months.

Found both adults happily perched near one another on sixth floor ledges in late afternoon.