<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 in the u. s. each year
when does the north american butterfly association count butterflies in the u. s. each year
July 1 July 4
July 1 July 4