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A HISTORY OF NORTHAMPTONSHIRE 202. Great Northern Diver. Colymbus glacialis, Linn. A rare winter visitor, usually keeping to the sea, but occasionally coming inland to rivers and large sheets of water. Three, at least, have been obtained in Northants. 203. Black-throated Diver. Co/ymbus arcticus, Linn. An occasional winter visitor, scarcer than the last, but of much the same habits. One was shot on Naseby reservoir on October 25th, 1881. 204. Red-thro.ited Diver. Co/ymbus septen- trionalis, Linn. An occasional winter visitor under much the same conditions as the last two species, but decidedly more abundant than either, and oftener seen on rivers. Obtained with us in winter dress, it should be remembered that the red throat is then not worn, being only a sum- mer adornment, as are also the black throats of the last two species. 205. Great Crested Grebe. Podicipes crhtatus (Linn.). A resident, wandering about, more or less, from autumn to spring, and breeding upon several of the larger sheets of water in the county, e.g. at Ravensthorpe, Naseby, Blather- wycke, Deene, Canon's Ashby, and Byfield. It is to be feared that the pike in these places get most of the young birds. 206. Red-necked Grebe. Podicipes griseigena (Boddaert). A winter visitor, uncommon, and usually marine in its habits. I have occasionally met with small parties on the north-east coast ; it has once been obtained on Naseby reservoir, on February 17th, 1876 [Lilford^ ii. 281), and one was seen at Saddington reservoir in March, 1899, by Mr. W. J. Horn. 207. Slavonian or Horned Grebe. Podicipes auritus (Linn.). An occasional winter and spring visitor, which has half a dozen times been obtained on ponds and reservoirs in Northants, no doubt on its way to or from Iceland, where it breeds abundantly (see Lilford., ii. 282, 283). 208. Eared Grebe. Podicipes nigricolUs (Brehm). A rare casual visitor, occurring indifferently at any time of the year, but not known to have bred in Britain. A pair were shot on Daventry reservoir in 1869 [Lilford). 209. Little Grebe or Dabchick. Podicipes fiuviatilis (Tunstall). Common and resident. A great skulker, therefore little seen in summer when reeds are thick. 210. Storni-Petrel. Proce/laria pe/agica,L,'mn. A purely marine species, except during the breeding season ; occasionally driven inland by severe gales, and has two or three times occurred in Northants. 211. Leach's or Fork-tailed Petrel. Oceano- droma leucorrhoa (Vieillot). A much rarer species than the last, yet it has been obtained four times in Northants (see Lilford, ii. 255, 256). 212. Manx Shearwater. Puffinus anglorum (Temminck). A pelagic species occasionally driven inland by storms. Three or four have been obtained in Northants {Lilford, ii. 250, 251). 213. Fulmar. Fulmarus glacialis (Linn.), A marine species occasionally driven inland by storms, whereof one specimen is recorded as having occurred near Bainton on April 4th, 1 88 1 {Lilford, ii. 253, 254). 128