Another MEGA - pale morph adult ARCTIC SKUA north over Amwell

The pale morph adult ARCTIC SKUA that spent 15 minutes or more at King George V Reservoir (London) late morning on Sunday 2 May (Roy Woodward et al) flew north up the Lea Valley and over Amwell GP later in the afternoon (Toby et al). This species is very rare indeed in Hertfordshire, particularly so in spring and in adult plumage