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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. [639]-Plate 22 ff. PDF (8.1 MB)


Page 649


          |              ,Jackson-Summer Birds of Door Peninsula.       
 649
the       |         In the short time we were on the breeding grounds it
was
ass              impossible to make a detailed study of the habits of these
    ~sts         interesting birds.  Fortunately there are available the
in-
one              vestigations of Ward 1 and Strong-' who have studied inde-
Eew              pendently the gulls on some of these islands.      The brief
wo-              remarks here presented are therefore of value merely for
was              comparison of original observations. As one approaches
L to     j      a rookery to within a mile or a mile and one-half, the gulls
,hat             first sally forth, a few at a time, to meet the visitor,
usually
ruly             keeping at least fifty yards from the intruder.   On nearer
two              approach of the visitor to their home, the gulls rise and
egg              circle over the island several minutes, in fact until the
in-
able      |      truder is about to land, then fly out over the lake where
they
bulls            settle on the water in a scattered flock a quarter of a
mile to
on              a mile from    shore.  Occasionally individuals or small
the             groups return to the island, encircle it, then fly back to
ight             "sea," this action continuing until the
intruder
leaves, when
; on            most of the gulls soon return to the island.
vith               The ordinary call note of the adult gull is a sharp, loud
vere             ke-d', given once or repeated several times. When flying
gre-             near the breeding grounds the gulls utter an alarm     note
und              which is not so loud as the call note, and usually of lower
part             pitch, though variable.  This alarm   note can be best ex-
ning             pressed by the syllables kfik"-kuk-ku&,
or sometimes
kfik"-
2, 3,          kik-klik-kj", at other times m e r e I y kik'-kii".
A  few
                 times a single bird was heard to alternate the trisyllable
ned,             with the bisyllable, but there seemed to be no regularity
in
iess.           the matter.  The downy young have a peep not dissimilar
dry             to that of a downy domestic chicken, but not frequently
Ving            used.
I or              The young up to half-grown were easily captured in the
each            hands. They usually attempted to escape first on land by
ased            concealing themselves in the grass, or under brush, logs,
was             or rocks, but upon further approach they would run to the
-half           water where they swam well, could not or would not dive,
the            and were easily captured.   Young up to one-fourth grown
onef            did not appear to be particularly gregarious, but the older
iests
mush,             'Ward, H. L. Notes on the herring gull and the caspian
tern (Larus
    colo-       argentatus and Sterna caspia). Bull. Wisconsin Nat. Hist.
Soc., vol. 4,
                PP. 113-134, plates 1-2, 1906.
                  'Strong, R. AI. On the habits and behavior of the herring
gull, Larus
                argentatfs Pont. Auk. vol. 31, pp. 22-49, 178-199, plates
3-10, 19-20, 1914.


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