Transactions of the Wisconsin Academy of Sciences, Arts and Letters
volume XXIII (1927)
Jackson, Hartley H. T.
Notes on the summer birds of Door Peninsula, Wisconsin, and adjacent islands, pp. -Plate 22 ff. PDF (8.1 MB)
650 Wisconsin Academy of Sciences, Arts, and Letters. young up to two-thirds grown gathered on the bars at the ends of the islands, or sometimes in the water in com- pac flcks Tey ppere tobe naie to iiy u-ii ve 'IF r MeT gus se The "sa brepeding pact flocks. They appeared to be unable TO nly Until over ac -a half-grown, and, although they fluttered and flapped their of the isle wings in an attempt to rise both from the land and water, I mon bree( their effort was extremely clumsy and ludicrous. The Clark Lak full-grown young of the year flew slowly and clumsily in I came dow: comparison with adults, which was accentuated by their , downy yo larger appearance due to their dark color against the sky. hurried o Crayfish (Cambarus) seemed to form an important food toward sh of the herring gull and the nesting rookeries in many so success places were strewn with the hard parts of this animal. not be dis Crayfish were also found in the stomachs of adults, and southern were seen regurgitated by them. One adult had two large feeding n( minnows (Notropis) in its oesphagus. It is probable that ous pairs many of the crayfish were captured alive by the gulls, a doned dus there were too many remains of them on the islands for all were seen to have been taken as carrion. protecting dled eggs. [Chroicocephalus philadelphia (Ord). Bonaparte's Gull. where sev A "little black-headed gull" which answers the descrip- about tw( tion of Chroicocephalus Philadelphia was reported by twenty, Ji fishermen to occur in this region in spring and fall.] female wi- Re-beaI Hydroprogne caspia imperator (Coues). Caspian Tern. This beautiful tern was occasionally seen flying over the water near Washington Island, and in Porte des Morts Passage (July 15, 1917). The only colony encountered was on the Spider Islands, where there were fifty or sixty birds. One of them was collected. Old nesting places were evident on Little Spider Island, where broken egg shells resembling parts of Caspian terns' eggs were found, and where a few old nesting hollows encircled by rem- Iold perch Red-breas- on the ish berry, anc and Big S male mer rocks, bru dled towai the bay. to locate i nants of the characteristic rings oi small WLIVllUo ays throi shells were discovered. The adult birds hovered overhead island; th in a flock as if still breeding, but we found no nests con, taining eggs or young. A few young birds well able to fly Anas plat, were with the flock. A regul There were no signs of terns on Gravel Island, where than the Ward found them breeding in July, 1905, but which they Lake, July had abandoned the following year (1906).3 ington Ish War1d, Henry L. Bull. WANisconsili Nat. Hist. Soe., X ol. 4, P. 1 one mile n
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