Hemaris tityus - Narrow-bordered Bee Hawk-moth

I'm so excited because yet another 'Bumble Bee' has turned out to be interesting. On our ramble today I just managed to get a quick photo of this insect as it flitted about amongst the Marsh Lousewort. I have to confess I thought it was a Bumble Bee, but later thought its proboscis was a bit long so uploaded it to ISpot for comments. The consensus is Hemaris tityus or Narrow-bordered Bee Hawk-moth which, although not rare, is certainly a new species for me and I'm sorry it didn't hover around long enough for others to see.

Becky