I found this little fellow in Murlough on Sunday, nectaring on devilsbit scabious. His underwings were so bright that at first I mistook him for a white. Closer inspection revealed something interesting.
![Image](http://millar153.files.wordpress.com/2011/08/11p8141248a-common-blue-aberration-600x451.jpg)
His orange spots are absent!
Here's a better-composed shot of him.
![Image](http://millar153.files.wordpress.com/2011/08/11p8141250-600x450.jpg)
And just to check, his upperwings seem to be normal.
![Image](http://millar153.files.wordpress.com/2011/08/11p8141249-common-blue-aberration-600x450.jpg)
Any ideas what the scientific term might be?
Sam