First butterfly sightings, previous years

No sightings yet this year. First butterfly sightings in other years:

• 2018 : February 21 Mourning Cloak
• 2017 : January 1 Orange Sulphur
• 2016 : February 28 Mourning Cloak
• 2015 : April 11 Spring Azure, Eastern Comma, and Mourning Cloak
• 2014 : April 14 Spring Azure