106 Mr. F. Du Cane Godman on the Birds of the Azores. 
stant and violent storms, which blow from all points of the 
compass, while the latter enjoy almost uninterrupted calms 
(Darwin’s ‘ Origin of Species/ p.433). Currents flow in 
varying directions round the Azores, being apparently influ¬ 
enced by the prevailing winds, while those of the Galapagos are 
strong and unvarying. The results are apparent. The storms 
which surround the Azores not only maintain, as it were, a cir¬ 
culation of the established species, but constantly bring a fresh 
stock from the different sources of supply. On the other hand, 
the calm weather and strong currents of the Galapagos not only 
sustain the isolation of that group from the continent of South 
America, but even almost preclude the existence of intercom¬ 
munication among the islands in sight of each other. 
Subjoined is a comparative list, showing the distribution of 
birds throughout the three groups of islands forming the archi¬ 
pelago of the Azores as I have previously defined them :— 
Table showing the distribution of birds in the Azores *. 
Eastern 
group. 
Central 
group. 
Western 
group. 
General range of the 
species. 
fTinnunculus alaudarius 
* 
, , 
• • 
Africa, Europe, Madeira. 
Buteo vulgaris... 
* 
* 
• . 
Europe, Madeira. 
Asio otus. 
* 
* 
• . 
Europe. 
Strix flammea. 
* 
* 
• • 
Africa, Europe, Madeira. 
Turdus merula. 
* 
* 
* 
N. Africa, Europe, Madeira. 
fOriolus galbula . 
• . 
.. 
N. Africa, Europ e,Madeira. 
Erytliacus rubecula, var. 
* 
• . 
IN. Africa, S. Eur., Madeira. 
Sylvia atricapilla. 
* 
* 
Europe, Madeira. 
Regulus cristatus. 
* 
* 
Europe, North Asia. 
Saxicola cenanthe .... 
" 
* 
North Africa, Europe, Ice- 
land,Greenland ,Labrador, 
Nova Scotia. 
Motacilla sulphurea .. 
* 
* 
* 
Asia, Europe, Madeira. 
* The dagger (t) prefixed before the name of a species signifies that it is 
a straggler, and not a resident. The names of places in the last column 
in italics signify that the appearance of the species there can only he con¬ 
sidered occasional. With regard to this list, I should mention that six 
species included in the Central group I saw in a collection made by a gen¬ 
tleman in Terceira; therefore, in order to arrive at the correct proportion, 
these should be subtracted, and the numbers would then stand:—Eastern 
Group, 40; Central, 36; Western, 29. 
