tags: Water Dikkop, Water Thick-knee, Burhinus vermiculatus, birds, mystery bird, bird ID quiz [Mystery bird] Water Dikkop, also known as the Water Thick-knee, Burhinus vermiculatus, photographed near the Kilombero River, Tanzania, Africa. [I will identify this bird for you in 48 hours] Image: Dan Logen, 9 January 2010 [larger view]. Nikon D300, 600 mm VR lens. ISO 320, 1/800 sec, f/7. Please name at least one field mark that supports your identification. Review all mystery birds to date.