Introdnetion : Migration. 
39 
T>ocal movements are the more to be expected among the birds of Celebes 
and other parts of the Archipelago in consequence of the great differences in 
the season often to be found in spots a few miles apart. The east side of the 
Southern Peninsula, for instance, has its wet season when the west side has its dry 
one, and when the west coast is deluged with rain, the east coast has fine weather, 
though the two districts are only some 30—60 miles apart. In a similar manner the 
north and south coasts of Ceram are contrasted, and traces of the same condition 
are seen on the north and south coasts of the North Peninsula of Celebes. The 
climate of the mountains is also strongly conti-asted with that of the plains. We 
have been at some pains to obtain particulars of the movements of the birds from 
o-entlemen resident in the East Indies, but have not received any data suited 
to the requirements of the present work, except some notes from Mr. H. Veen 
of Kele Londej, a place situated at a height of about 3000 ft. in the Minahassa. 
Mr. Veen has observed in the case of a few species (“Sonsoliat”, ‘“Tegi”, “Tang- 
_ Hypothymis puella, “Keresow”) that their movements are affected by the 
abundance or scarcity of food; they generally arrive in groups and start again 
after 3—4 weeks. He adds: “The blossoming and the ripening of the fruits 
goes on the ivhole year, according to the altitude, e. g. the Lansap {Lansium 
domesticum) ; near the coast this fruit is ripe towards the end of December and 
in January; a little higher up in February and March; still higher from April 
to August. The Durian and the Mango are ripe near the coast as early as 
December and January, but at Langowan (in the hills) in April June. Ihe 
Coffee-tree is in blossom in Kele Londej the whole year round, but at its fullest 
from November to February, and it begins partially to ripen in May. At Langowan 
this occurs about a fortnight earlier, and at Tondano a fortnight earlier still. 
Last year (1893) coffee was gathered every month, though in various quantities. 
And this though Kele I.ondej is only about 400 ft. higher than liangowan, and 
Langowan orrly aborrt 200 ft. higher than Tondano”. 
Other phaenological observations from Celebes than these, except stray ones, 
have not reached us, though we possess such from Middle Tmzon, which, how- 
ever, woirld not afford a crucial test for Celebes. 
Islet nomads. — A curiorrs phase of rnigratiorr is displayed by several Pigeons 
of the East Indian Archipelago. The species occurring in the Celebesian area and 
displaying the characteristic in question are Caloenas nicobanca, Myristicivora bicolor, 
Carpophaga concinna and C. pickeringi. These birds — at least the two first and 
better known species — are highly gregarious; they repair to breed on certain 
fixed islets and during the rest of the year seem to wander from one small 
island to another within their range, only occurring exceptionally on the neigh- 
bouring mainlands. In this manner the Myristicivora and the Caloenas have a 
range of three or four thousand miles, and that of Carpophaga concinna is also 
large. The Nutmeg Pigeon, Myristicivora, is often excessively numerous; we 
read of the lofty trees of a small island being simply covered with thousands 
