Graffiti for butterflies

Butterfly graffiti directs migrating monarchs to urban food sources.

Monarchs regularly pass through wide swathes of human settlement as they migrate each year from wintering sites in Mexico to summering grounds in the United States and Canada. GFB is the equivalent of a fast-food sign on a highway, advertising rest stops (waystations) to monarchs traveling through the area.

• butterflies
• graffiti