when does the north american butterfly association count butterflies in the us every year
North American Butterfly Association As with the National Audubon Society and the Christmas Bird Count, the NABA holds annual volunteer butterfly counts in the weeks leading up to or after July 4 in the United States, July 1 in Canada, and September 16 in Mexico. Volunteers scout out a meeting place and map out a 15 mile circle in which they count all the butterflies they see in one day. These counts give clues into the butterfly biodiversity of a particular region.