Amended :t:
It seems that when creating a new species page in Opus you also have to create a page for the scientific name with a redirect to the common name titled page else the new page headed with the common name won't work.
I've added the redirect page so the links work now.
I've amended all the relevant Asian/European birds from Black-billed Magpie to Eurasian Magpie but left the others with Common Magpie as that's what it's known as over here in the ID guides.
The Black-billed have been amended to Pica hudsonia :t:
At http://www.birdforum.net/gallery/showphoto.php/photo/182164/limit/recent it should be Centropus superciliosus