. The birds of Maine; with key to and description of the various species known to occur or to have occured in the state, an account of their distribution and migration, showing their relative abundance in the various counties of the state as well as other regions, and contributions to their life histories . ock; winter visitor down the bay,(Knight). Kennebec; one killed itself by flying against the ice at Gardiner,(Powers, J. M. 0. S. 1905, p. 29). Knox; winter visitor, (Rackliff). Penob-scot ; occasionally taken in the vicinity of Bangor after severe winter storms,(Knight). Sagadahoc; in wint
. The birds of Maine; with key to and description of the various species known to occur or to have occured in the state, an account of their distribution and migration, showing their relative abundance in the various counties of the state as well as other regions, and contributions to their life histories . ock; winter visitor down the bay,(Knight). Kennebec; one killed itself by flying against the ice at Gardiner,(Powers, J. M. 0. S. 1905, p. 29). Knox; winter visitor, (Rackliff). Penob-scot ; occasionally taken in the vicinity of Bangor after severe winter storms,(Knight). Sagadahoc; in winter, not plenty, (Spinney). Waldo; rare win-ter visitor, (Knight). Washington; in winter only, (Boardman). The Dovekie is exclusively a winter bird, occurring generallyamong the outer islands of the coast, though by no meanscommon, and likely to be reported inland in almost any sectionof the State after severe storms. They usually occur from lateNovember until mid March. In Arctic regions they are saidto nest on shelves of rock or in crevices of rocky cliffs on islandsor along shores fronting the sea. A single pale greenish blueor bluish white egg is stated to be laid which measures X according to the various authorities. The foodconsists of surface swimming marine life and small o ■* X 5 H S o -•■ o i O 2 JAEGERS 39 Order LONGIPENNES. Long-winged Swimmers. Family STERCORARIID^. Skuas and Jaegers. Genus STERCORARIUS Brisson. Key to the species of STERCORARIUS. A. Wing more than ; culmen or more; tarsus more than ; middle tail feathers not pointed. Pomarine Jaeger. B. Wing less than ; culmen less than ; tarsus less than ; tail feathers pointed.* Distance from end of shield on bill to tip of bill less than lengthof shield itself ; length of tail in adults always less than Jaeger.** Distance from end of shield on bill to tip of bill greater thanlength of shield itself; length of tail in adults greater than
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