A Field Guide for Birds of the Southwest Pacific Birds of the Southwest Pacific. a Field Guide to the Birds of the Area Between Samoa, New Caledonia, and Micronesia Ernst Mayr

Griscom, Ludlow (April 1945). "A Field Guide for Birds of the Southwest Pacific Birds of the Southwest Pacific. a Field Guide to the Birds of the Area Between Samoa, New Caledonia, and Micronesia Ernst Mayr". The Auk. Oxford University Press. 62 (2): 319–321. doi:10.2307/4079740. ISSN 0004-8038.

Abstract: Recent Literature of recognition of the mate or of other individuals of the same species provided some surprising figures on the distance at which it appears to be effective.Drakes deserted the females and territories as soon as the clutch was complete or no more than a week or ten days later.A second nesting, after the drake's departure, is doubtful.The drake's molt into eclipse plumage may begin early in the nuptial period, before it leaves the territory.The first males to molt are the earliest-mated birds, while the last are the latest-mated or the unmated birds.It is suspected that the full eclipse plumage is acquired only by young birds in their first few seasons; some individuals seven and eight years old lost their flight-feathers but not the body plumage.The Ruddy Duck was found to differ from the other resident species in that it passes the flightless period in worn nuptial plumage and, when again able to fly, molts into a dull winter plumage that is worn until late winter or early spring, when a new breeding plumage is acquired.In the matter of sex ratios, it was found that, in general, males outnumbered the females, although a shooting-bag count during four seasons showed more females than males to have been killed except in the Mallard and Redhead.Differentials are tabulated, including the proportions of young and old birds.These are only a few of the interesting details discussed in the book.The general purpose of the studies on which the volume is based was to uncover information that would be useful in wildlife management, to which a special chapter is devoted, but the report should interest a much wider circle of readers.It may be recommended as a valuable contribution to our knowledge of American birds.--J.T. ZigmaR.A Field Guide for birds of the Southwest Pacific.t--Apreface by Dr. R. C

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