The Tulsa Audubon Society participates
every year in the National Audubon Society annual Christmas
Bird Count. The Christmas Count is a long-standing program of the National
Audubon Society. It is an early-winter bird census, where volunteers
follow specified routes through a designated 15-mile (24-km) diameter
circle, counting every bird they see or hear all day. It’s not just a
species tally—all birds are counted all day, giving an indication of
the total number of birds in the circle that day. All individual CBC’s
are conducted in the period from 14 December to 5 January (inclusive
dates) each season, and each count is conducted in one calendar day.
Tulsa's area is a circle that encompasses most of northern Tulsa County.