Butterfly Density and Behaviour in Uncut Hay Meadow Strips: Behavioural Ecological Consequences of an Agri-Environmental Scheme Lebeau, Julie ; Wesselingh, Renate A. ; Van Dyck, Hans Abstract Publication: PLoS ONE Pub Date: August 2015 DOI: 10.1371/journal.pone.0134945 Bibcode: 2015PLoSO..1034945L