tags: Green Barbet, Stactolaema olivacea, birds, mystery bird, bird ID quiz [Mystery bird] Green Barbet, Stactolaema olivacea, photographed at Udzungwa Mountains National Park, Tanzania, Africa. [I will identify this bird for you in 48 hours] Image: Dan Logen, 10 January 2010 [larger view]. Nikon D300, 200-400 VR lens at 400 mm., ISO 800, 1/640 sec, f/7.1. Please name at least one field mark that supports your identification. Review all mystery birds to date.