This pretty Silvery Blue was hanging out in the 2011 naturalization area. The host plants for this species of butterfly are members of the pea family such as Bird's foot Trefoil and Purple Vetch. Bird's foot Trefoil does very well for the first couple of years after a lawn is left to go wild. It is now mostly absent from the 2009 naturalization area although there were great mats of it smothering out the competition in 2009 and 2010. In the 2011 naturalization area it is still doing very well.