Hawaiian Goose (Poyser Monographs) by Janet Kear, A. J. Berger

By Janet Kear, A. J. Berger

Dr Janet Kear, Assistant Director of the Wildfowl belief and Curator of its Martin Mere Reserve, and Professor Andrew Berger of the collage of Hawaii, have written a well timed and soaking up account of the new heritage of the Hawaiian Goose, or Nene, its descent to close extinction, its 11th hour rescue and present recovery to the wild. The species declined from an predicted inhabitants of 25,000 in Hawaii within the 18th century to lower than fifty birds within the Nineteen Forties. this present day, thank you principally to the prolonged breeding programmes at Slimbridge and Pohakuloa, there are possibly greater than 2000 Hawaiian ducks on the planet. The success is justly applauded and recognized, yet no matter if this notable test in conservation has been really winning aren't transparent till it turns into obvious that the published birds can retain a breeding inhabitants within the wild. because the authors clarify, the result is way from predictable. The motives which ended in the species' decline and the dangers and problems confronted by means of the reintroduced inhabitants are mentioned at size, however the center of the e-book is the propagation programmes at Slimbridge and Pohakuloa, and the issues and successes they introduced in the course of decades of sufferer paintings. For the conservationist and aviculturalist the debts of captive breeding less than headings resembling infertility, vitamin, toughness, mortality and the consequences of foster moms, geographical range and genetic pressure, might be crucial examining. adequately, Sir Peter Scott, whose imterest and involvement within the rescue of the Hawaiian Goose was once of major value, is without doubt one of the artists whose drawings complement the textual content. there's additionally a color frontispiece and 24 monochrome plates.

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The pale neck plumage is not vibrated by an extremely aggressive goose, but some of the dark feathers on the back are raised, presumably to accentuate the birds' size. Courtship, which results in the establishment of a pair-bond that tends to be life-long, takes place in the second year. As in all geese, it is an inconspicuous and lengthy process. The male walks rather stiffly ahead of the female, showing his white undertail (in other geese, this is done on the water). Once the female has accepted him, 1.

Blossom; P. Wallis; G. Williams; ]. B. Blossom. Vi> 4. Top: A small kipuka surrounded by an aa Java fJow. Keauhou Sanctuary. 9 January 1973. Photo A. J. Berger. Bottom: Nene sometimes are very inconspicuous on aa lava flows; note the paJe neck and breast of the bird near the edge of the kipuka in the distance. This picture aJso shows the typicaJ reJationship between a Java /Jow and a kipuka. Photo: A. J. Berger 10 January 1973. Keauhou Sanctuary, Mauna Loa. 5. A pair of Nene in the Keauhou Sanctuary, Mauna Loa, 9 January 1973.

6. Various intensities of the 'upright threat' posture. Above left: low intensity display in male with ten-day-old gosling at SJimbridge. Above right: a higher intensity posture, with mouth opening and feathers at the nape being lifted. Bottom right: high intensity threat with open mouth, exposed tongue and ruffled nape feathers. Photos: J. B. Blossom. 7. Intensities o/ the 'forward threat' posture. The birds at the top are the least likely to attack, while the gander at the bottom is the most aggressive.

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