The End Of The Blackthorn Winter?

A spell of cold weather in spring when the blackthorn is blooming has traditionally been known as a blackthorn winter. We've had frost, sleet and snow over the past week but the forecast is for warmer weather. The blackthorn is in full snowy bloom, I love it and always feel sad when it starts to fade. I photographed this hoverfly on a blackthorn flower but unfortunately I haven't captured enough detail to identify it.

It was frosty first thing but lovely and sunny. I heard mewing and shortly afterwards a pair of buzzards flew into view.