Life histories of North American shore birds, Part 1 (of 2)Bent, Arthur Cleveland
Science
Life histories of North American shore birds, Part 1 (of 2)
Bent, Arthur Cleveland
Birds -- Behavior; Shore birds -- North America
_Eggs._--These are normally four in number, though occasionally three
may be met with. They are pyriform in shape with a pale stone colored
ground and boldly spotted and blotched with dark umber, shading into
black and numerous ashy gray shell markings. The markings are usually
denser and more concentrated at the big end, often with a tendency to a
zone. The measurements of 100 eggs from northern Europe (69 by the
writer, 19 by Goebel, and 12 by Rey) average 45.3 by 31.8 millimeters;
the eggs showing the four extremes measure =48.8= by 31.9, 46.2 by
=33.3=, =41.2= by 31.7, and 46.5 by =29.5= millimeters. Rey (1905) gives
the average weight as 1.107 g. and Goebel as 1.035 g.
_Young._--As to the share of the sexes in incubation our information is
scanty; but, such as it is, goes to prove that it is conducted by the
female alone. Naumann (1887) gives the period as 17 to 18 days and
states that as soon as the young are dried they leave the nest and take
to the long grass which effectually conceals them.
_Plumages._--The reader is referred to A Practical Handbook of British
Birds, edited by H. F. Witherby (1920), where a complete account of the
plumages and molts of this species is given.
_Food._--Naumann (1887) records small worms, insect larvae, small
snails, coleoptera, water insects, and larvae of Phryganeidae. Yarrell
(1871) includes larvae of insects, especially Tipulidae, and small slugs
as well as worms. These last seem to form the staple diet.
_Behavior._--The family parties soon break up and from late autumn to
its arrival on the breeding grounds it is more likely to be met with
singly than in company. Its flight is not so rapid as that of the common
snipe, but slower and more direct, while instead of uttering the well
known _scape_, it either rises in silence or merely utters a guttural
croaking note.
_Fall._--More frequently met with in the British Isles on the autumn
migration from the end of July to mid-November than in spring, but
probably frequently overlooked. By the beginning of August the young are
full grown normally, and gradually make their way from the high north in
Norway southward, the majority of migrants taking an easterly course and
only a small proportion moving south-westward to the winter quarters.
DISTRIBUTION
_Breeding range._--Norway, north to Tromsö, Sweden, to latitude 65° N.,
formerly in Denmark but now extinct, as also in Schleswig. It is said to
have bred formerly in Holland and still does so in East Prussia and
eastward to Estonia, Finland, Russia, according to Buturlin, up to
latitude 63° near the Great Lakes, 65-1/2° on the White Sea, and 67-1/2°
in the Petchora, while southward it is said to breed in Bessarabia
(Rumania) and in the Governments of Kieff, Poltava, Kharkoff, and
Voronsh, and to 51-1/2° N. in the Urals as well as in the Caucasus. In
Asia it breeds near Omsk, in the Altai and the tributaries of the Ob,
but not beyond the Yenesei or in East Siberia.
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