<P> Open searches , also sometimes referred to as `` checklist searches '' , are intended to focus on the presence and abundance of butterflies in a given area . They can be single events such as the North American Butterfly Association 's July 1 and July 4 counts in Canada and the U.S. respectively , or they can be regular or ad hoc counts conducted by individuals or groups . The lack of formal structure makes them suitable for many citizen science programs . </P>
<P> Open searches , also sometimes referred to as `` checklist searches '' , are intended to focus on the presence and abundance of butterflies in a given area . They can be single events such as the North American Butterfly Association 's July 1 and July 4 counts in Canada and the U.S. respectively , or they can be regular or ad hoc counts conducted by individuals or groups . The lack of formal structure makes them suitable for many citizen science programs . </P>
when does the north american butterfly association count butterflies each year
when does the north american butterfly association count butterflies each year
July 1 July 4
July 1 July 4