THIS MONTH’S EXPERT PANEL

CHRIS HARBARD After many years at the RSPB, Chris is now a tour leader, writer and editor. He lives in Arizona, USA, and travels widely.

ROB HUME began watching birds as a child. He worked for the RSPB for many years and has written several books, including one on jizz.

ED STUBBS is BirdGuides and Birdwatch Content Editor and has a keen interest in migration and patch watching.

ANDY STODDART is Vice-Chair of the Rarities Committee with many years’ birding experience, and the author of several books and ID papers.

MIKE ALIBONE is Birdwatch’s Optics Editor. He has been testing binoculars and telescopes for more than 15 years.

HEIN VAN GROUW is Curator of Birds at the Natural History Museum in Tring. He has a lifelong interest in colour mutations in birds.