Zinnias and butterflies

One of the annual flowers I plant every year are zinnias.  They are hardy and stand up well to the heat and dry conditions we seem to be having a lot of lately!  Zinnias are so colorful and add some cheer to the yard.  They are very easy to grow from seeds too.  Another thing I love about zinnias is how they attract butterflies.  There have been some little yellow butterflies hovering around them for a couple weeks but just today I noticed this black swallowtail out there.  They usually come every year, and they're one of my favorite butterflies.