CAYENNE TERN Thalasseus (sandvicensis) eurygnatha


Two examples of the aforementioned (sub)species. As well as the bill being yellow, there also seems to be much variation in size and shape. The adult bird here has a bill shaped more like an Elegant Tern, whereas the flight shot, albeit a young bird, has a short bill. Intergrades with Cabot's do occur in a cline, so it may not be a good species.


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