Great Southern White

I am just back from Texas, where I spent about ten days. The first night I spent on South Padre Island, and the first day out I went to the World Birding Center. On the boardwalk I saw a few birds, but also Great Southern Whites. (See that white spot in the middle of the first photo? That is a butterfly!) I was surprised to find butterflies in such a marshy area, but a little research revealed that they eat something called "beach cabbage" and besides living in fields and gardens, they frequent salt marshes and coastal dunes. Very lovely butterfly up close. Much bigger and nicer than a cabbage white.