Island Life; Or, The Phenomena and Causes of Insular Faunas and FlorasWallace, Alfred Russel
Science
Island Life; Or, The Phenomena and Causes of Insular Faunas and Floras
Wallace, Alfred Russel
Biogeography; Glacial epoch; Island ecology
This list exhibits to us the marvellous fact that more than half the
peculiar species of Formosan birds have their nearest allies in such remote
regions as the Himalayas, South India, the Malay Islands, or Japan, rather
than in the adjacent parts of the Asiatic continent. Fourteen species have
Himalayan allies, and six of these belong to genera which are unknown in
China. One has its nearest ally in the Nilgherries, and five in the Malay
Islands; and of these six, four belong to genera which are not Chinese. Two
have their only near allies in Japan. Perhaps more curious still are those
cases in which, though the genus is Chinese, the nearest allied species is
to be sought for in some remote region. Thus we have the Formosan babbler
(_Garrulax ruficeps_) not allied to the species found in South China, but
to one inhabiting North India and East Thibet; while the black bulbul
(_Hypsipetes nigerrimus_), is not allied to the Chinese species but to an
Assamese form.
In the same category as the above we must place eight species not peculiar
to Formosa, but which are Indian or Malayan rather than Chinese, so that
they offer examples of discontinuous distribution somewhat analogous to
what {407} we found to occur in Japan. These are enumerated in the
following list.
SPECIES OF BIRDS COMMON TO FORMOSA AND INDIA OR MALAYA, BUT NOT FOUND IN
CHINA.
1. _Siphia superciliaris._ The Rufous-breasted Flycatcher of the S. E.
Himalayas.
2. _Halcyon coromanda._ The Great Red Kingfisher of India, Malaya, and
Japan.
3. _Palumbus pulchricollis._ The Darjeeling Wood-pigeon of the S. E.
Himalayas.
4. _Turnix dussumieri._ The larger Button-quail of India.
5. _Spizaetus nipalensis._ The Spotted Hawk-eagle of Nepal and Assam.
6. _Lophospiza trivirgata._ The Crested Gos-hawk of the Malay Islands.
7. _Bulaca newarensis._ The Brown Wood-owl of the Himalayas.
8. _Strix candida._ The Grass-owl of India and Malaya.
The most interesting of the above are the pigeon and the flycatcher, both
of which are, so far as yet known, strictly confined to the Himalayan
mountains and Formosa. They thus afford examples of discontinuous specific
distribution exactly parallel to that of the great spotted kingfisher,
already referred to as found only in the Himalayas and Japan.
Public-domain text, read in full here on John Shaqi.
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