Photographic studies of some less familiar birds: LXXVII. Red-necked and Black-necked Grebes

(Plates 1-8) THERE are some twenty species of grebes in the world, but the five that occur in Britain a r e the only ones in the Palaearctic. Of these, the Great Crested (Podiceps cristatus) and the Little (P. ruficollis) are comparable in their distribution, both being found in Europe, southern Asia, Africa and Australasia, while the other three--the Red-necked ( P . griseigena), the Slavonian (P...