OK, it's subtle, but when you look into the woods this time of year and see yellow flowers on the trees, it's probably Sassafras.  

 

They are a little fuzzy, and hard for us to see, but they are host plants for several swallowtail butterflies.  So look for them and know that butterflies are happily reproducing themselves.  Happy news, right there.  

 

 

HAPPY SPRING!!!!