Browsing by Author "Gilliard, E. Thomas (Ernest Thomas), 1912-1965."
Now showing 1 - 20 of 41
Results Per Page
Sort Options
Item Birds collected on Batanta, off western New Guinea, by E. Thomas Gilliard in 1964. American Museum novitates ; no. 2258(New York, N.Y. : American Museum of Natural History, 1966) Greenway, James C. (James Cowan), 1903-; Gilliard, E. Thomas (Ernest Thomas), 1912-1965.Item Birds of central New Guinea : results of the American Museum of Natural History expeditions to New Guinea in 1950 and 1952. Bulletin of the AMNH ; v. 103, article 4(New York : [American Museum of Natural History], 1954) Mayr, Ernst, 1904-; Gilliard, E. Thomas (Ernest Thomas), 1912-1965.; Gilliard New Guinea Expedition (1950-1951); Armand Denis New Guinea Expedition (1952)Item The birds of Mt. Auyan-tepui, Venezuela. Bulletin of the AMNH ; v. 77, article 9.(New York : The American Museum of Natural History, 1941) Gilliard, E. Thomas (Ernest Thomas), 1912-1965.; Phelps Venezuelan Expedition (1937-1938)Item Birds of the middle Sepik region, New Guinea : results of the American Museum of Natural History expedition to New Guinea in 1953-1954. Bulletin of the AMNH ; v. 132, article 4(New York : [American Museum of Natural History], 1966) Gilliard, E. Thomas (Ernest Thomas), 1912-1965.; Lecroy, Mary.; Sepik River Expedition of the American Museum of Natural History (1953-1954)Item Birds of the Schrader Mountain region, New Guinea : results of the American Museum of Natural History expedition to New Guinea in 1964. American Museum novitates ; no. 2343(New York, N.Y. : American Museum of Natural History, 1968) Gilliard, E. Thomas (Ernest Thomas), 1912-1965.; Lecroy, Mary.; Gilliard New Guinea Expedition 1964)Item Birds of the Victor Emanuel and Hindenburg mountains, New Guinea : results of the American Museum of Natural History expedition to New Guinea in 1954. Bulletin of the AMNH ; v. 123, article 1(New York : [American Museum of Natural History], 1961) Gilliard, E. Thomas (Ernest Thomas), 1912-1965.; Lecroy, Mary.; Sepik River Expedition of the American Museum of Natural History (1953-1954)Item A comparative analysis of courtship movements in closely allied bowerbirds of the genus Chlamydera. American Museum novitates ; no. 1936(New York, N.Y. : American Museum of Natural History, 1959) Gilliard, E. Thomas (Ernest Thomas), 1912-1965.; Warham, John."A comparative analysis of the courtship movements of two closely related allied species of bowerbirds is presented. One male of a dimorphic species, the great gray bowerbird (Chlamydera nuchalis), possesses a bright nuchal crest; the other, belonging to a monomorphic species, has no crest. Both were observed to display with the back of the head turned towards the female in an awkward manner, apparently intended to show the crest. The crested species displayed vigorously with the crest and to a minor degree with ornaments held in the bill; the crestless species displayed vestigially with the non-existent crest and then vigorously with ornaments held in the bill. The hypothesis is advanced that the vestigial head-twisting movements indicate that the crest has been secondarily lost as a result of the transfer of sexual signaling from sexual plumage to sexual objects. This hypothesis is presented as a second line of evidence for the transferral theory, a theory, based on an examination of study skins and of bowers, that presumes to account for the inverse ratio existing between the development of sexual plumage and the development of the bowers in certain species of the Ptilonorhynchidae"--P. 7.Item The courtship behavior of Sanford's bowerbird (Archboldia sanfordi). American Museum novitates ; no. 1935(New York, N.Y. : American Museum of Natural History, 1959) Gilliard, E. Thomas (Ernest Thomas), 1912-1965."Sanford's bowerbird (Archboldia sanfordi) was discovered in 1950 in the forests of Mt. Hagen, New Guinea. This species, together with the closely related Archbold's bowerbird (A. papuensis) of western New Guinea, for which a new genus was erected in 1940, differs sharply from all other bowerbirds. Nothing was known of the bower-building behavior of either species except for some circumstantial evidence that the bower took the form of a fern mat in A. sanfordi. In that species the male is sooty black, with a golden crown, whereas in the western species the male is blackish gray, with no trace of color on the head. The females of the two species are so similar that they might easily be taken as belonging to the same species. It is this phenomenon that led to the development of the hypothesis that in certain closely related species of bowerbirds the transfer of sexual signals to objects has brought about the secondary loss of sexual plumage in the males. The loss of sexual plumage is postulated to be responsible for the lack of a crest in A. papuensis, although the bower and bower behavior of that species remain to be discovered and analyzed. The male of A. sanfordi builds a bower that is a mat of ferns and vines adorned with snail shells, resin, and strands of gold-colored bamboo. It spends much time arranging these ornaments and the fern stage which appears to be the territory of a single male. The male is adept at making ventriloquistic notes, in crying harshly, and in making noises like the tearing of cardboard. The display is unique. When the female comes to the bower, the male immediately assumes an infantile attitude in which it flattens its body on the fern mat, chews, with its bill mostly open, on a slender vine, and flutters its wings as does a young bird waiting to be fed. The female does not land on the ferns but remains on low perches encircling the bower. The female appears to dominate the male. When she changes perches she hovers noisily over the prostrate male who continues to 'crawl' in her direction for as long as 22 minutes at a time. Copulation was not observed. The biological advantage of this form of display was not determined"--P. 17Item Descriptions of seven new birds from Venezuela. American Museum novitates ; no. 1071(New York City : The American Museum of Natural History, 1940) Gilliard, E. Thomas (Ernest Thomas), 1912-1965.; Phelps, William H. (William Henry), b. 1875.Item The ecology of hybridization in New Guinea honeyeaters (Aves). American Museum novitates ; no. 1937(New York, N.Y. : American Museum of Natural History, 1959) Gilliard, E. Thomas (Ernest Thomas), 1912-1965."Observations shedding new light on the hybridization of wattle birds and black-billed honeyeaters (Mayr and Gilliard, 1952b) are presented. Evidence is presented that the two groups are not conspecific, despite their interfertility under certain widespread conditions of habitat disturbance. New collections from the Victor Emmanuel, Hindenburg, and Mittag mountains, as well as nestlings from three widely separated regions of eastern, central, and western New Guinea, are analyzed. It is demonstrated that wattle birds are essentially forest-edge birds of the northern watershed and that the black bills are essentially pure forest birds of the central range and southern watershed. The hypothesis is advanced that, as a result of the removal of the mountain forests by man, these two morphologically very different groups were brought into hybrid contact and that zones of hybridization formed along the artificial forest edges in the midst of what had formerly been pure mountain forest. In such 'belt'-shaped areas of disturbance, in which the mechanisms of ecological isolation between the two groups of honeyeaters had been destroyed, wattle-bird genes flowed into new regions with black-bill genes to form hybrid swarms that sometimes became secondarily isolated. Two such swarms are postulated to have become stabilized and to have become taxonomically distinct from the parent species. The question of taxonomic recognition for 'races' of hybrid ancestry between valid species is studied, and the conclusion is reached that morphological criteria and not lines of descent should dictate whether such races are valid or not. The problem of the assignment of such a race to a species group is studied. It is decided to assign it to the parent it more nearly resembles. These conclusions are expressed in a revision of these two groups of hybridizing honeyeaters in which the wattle birds and the black bills are recognized as constituting two distinct species. Two races of hybrid ancestry (but nearest in composition to black bills) are recognized"--P. 24-25.Item Four new birds from the mountains of central New Guinea. American Museum novitates ; no. 2031(New York, N.Y. : American Museum of Natural History, 1961) Gilliard, E. Thomas (Ernest Thomas), 1912-1965.; Sepik River Expedition of the American Museum of Natural History (1953-1954)Item Four new gobies from New Guinea. American Museum novitates ; no. 1539(New York : American Museum of Natural History, 1951) Nichols, John T. (John Treadwell), 1883-1958.; Gilliard, E. Thomas (Ernest Thomas), 1912-1965.; Ruda, Edwin.; Archbold Expedition to New Guinea 1936-1937); Archbold Expedition to New Guinea 1938-1939); Gilliard New Guinea Expedition 1950-1951)Item Frogs of the genus Platymantis (Ranidae) in New Guinea, with the description of a new species. American Museum novitates ; no. 2374(New York, N.Y. : American Museum of Natural History, 1969) Zweifel, Richard George, 1926-; Gilliard, E. Thomas (Ernest Thomas), 1912-1965.; Somadikarta, S. (Soekarja), 1930-Item The murine opossums (genus Marmosa) of the West Indies ; and, The description of a new subspecies of Rhipidomys from Little Tobago. American Museum novitates ; no. 2070(New York, N.Y. : American Museum of Natural History, 1961) Goodwin, George Gilbert.; Tate, G. H. H. (George Henry Hamilton), 1894-1953.; Thurab, Franklin.; Greenhall, Arthur Merwin, 1911-; Gilliard, E. Thomas (Ernest Thomas), 1912-1965.Item A new bower bird (Archboldia) from Mount Hagen, New Guinea. American Museum novitates ; no. 1473(New York : American Museum of Natural History, 1950) Mayr, Ernst, 1904-; Gilliard, E. Thomas (Ernest Thomas), 1912-1965.; Gilliard New Guinea Expedition 1950-1951)Item A new caecilian of the genus Gymnopis from Brazil. American Museum novitates ; no. 1278(New York City : The American Museum of Natural History, 1945) Dunn, Emmett Reid, 1894-1956.; Gilliard, E. Thomas (Ernest Thomas), 1912-1965.Item A new microhylid frog from the Adelbert Mountains of New Guinea. American Museum novitates ; no. 2012(New York, N.Y. : American Museum of Natural History, 1960) Zweifel, Richard George, 1926-; Gilliard, E. Thomas (Ernest Thomas), 1912-1965.; Gilliard, Margaret.Item A new puff-bird from Colombia. American Museum novitates ; no. 1438(New York : American Museum of Natural History, 1949) Gilliard, E. Thomas (Ernest Thomas), 1912-1965.Item A new race of Grallaria excelsa from Venezuela. American Museum novitates ; no. 1016(New York City : The American Museum of Natural History, 1939) Gilliard, E. Thomas (Ernest Thomas), 1912-1965.; Phelps Venezuelan Expedition (1937-1938)Item A new race of the honey-creeper, Diglossa cyanea, from Venezuela. American Museum novitates ; no. 1603(New York : American Museum of Natural History, 1952) Zimmer, John T. (John Todd), 1889-1957.; Phelps, William H. (William Henry), b. 1875.; Gilliard, E. Thomas (Ernest Thomas), 1912-1965.; Phelps Venezuelan Expedition (1937-1938)