Getting the blues is not something many people think about in April when thewhole world is bursting with new life. However, spring is when some of nature’sloveliest blues arrive.Spring Azures are butterflies that appear in the earliest days of spring, fromCanada to Florida. Their Latin scientific name is Celastrina ladon, which can beloosely translated as Heavenly Spirit. And indeed, watching these baby-blue waifsflit gracefully along the ground – visiting both flowers and mud puddles – it is...