While fishing on the river in north yorkshire?

Question

i seen a large white butterfly LIKE thing skimming across the water----it was definitly not a swallow or martin-----it was about 3 inches long and looked more like a swallow tail butterfly but was pure white----it seemed to glide across the water rather than flap like a cabbage white would------i watched mezmerized for 5 minutes having never seen anything like it before.can anyone identify the species please.

Answer 1

hello.a little reading for you.what i read is that it"s alittle late in the season for   swallow tail butterflies..

http://www.ukbutterflies.co.uk/species.p...

http://www.google.com/search?hl=en&rls=c...

good luck  with it anyway..

Answer 2

It may have been an albino swallow or swift...martins arnt so common near water! rare to see an albino type!