GULL-BILLED TERNS ON ABACO The gull-billed tern Gelochelidon nilotica had a name upgrade from Sterna nilotica some years ago, and was awarded the honour of its own genus.  Let’s be clear at the outset: there’s no such thing as a tern-billed gull. Which fortunately lessens the scope for species confusion.  There are 12 species of tern recorded […]