William a burnham (11 Ergebnisse)

PAP. Zustand: New. New Book. Shipped from UK. Established seller since 2000.

PAP. Zustand: New. New Book. Shipped from UK. Established seller since 2000.

Zustand: As New. Unread book in perfect condition.

Zustand: As New. Unread book in perfect condition.

Taschenbuch. Zustand: Neu. Neuware - A ten year study began in 1972 in West Greenland to investigate the breeding biology of the peregrine falcon. Data on nesting gyrfalcons were also collected. Thirty-four peregrine nesting sites were examined in the 6050 km2 inland study area near Søndre Strømfjord. Limited research also centered in Disko Bugt and Frederikshåb. Peregrines were found nesting predominantly on high, south-facing cliffs, which overlooked large areas. The mean minimum distance between peregrine eyries was 7.7 km for the inland area (1972 and 1973) and 55 km for the coast (1974). Approximately 60 percent of the inland nesting sites were occupied each year. A ten-year average production of 1.90 young per occupied site and 2.78 young per successful site was determined. Lapland longspurs, snow buntings, wheatears, and redpolls comprised 90 percent of the peregrines diet. Raven nests and prey availability may be the most significant factor affecting falcon density. Addled peregrine eggs, eggshell fragments, and peregrine prey species were collected. Whole eggs averaged 14.3 ppm wet weight (305 ppm lipid weight ) DDE, while eggshell measurements showed a 16 percent thinning compared with pre-1940 eggs from Greenland. Prey species carried low levels of DDE. The peregrine population appears to be at a near critical contamination level, and a small increase in DDE level could contribute to a population decline. No indication of a decline has been observed during the study, and the population appears stable. The project banded 185 peregrines, from which 8 recoveries occurred. The recoveries suggest peregrines migrate south to winter in South America.…

Zustand: New. KlappentextrnrnA ten year study began in 1972 in West Greenland to investigate the breeding biology of the peregrine falcon. Data on nesting gyrfalcons were also collected. Thirty-four peregrine nesting sites were examined in the 6050 km2 inland.

Hardcover. dj. First Edition. First Edition. Hardcover. From the library of Dr. Oliver Sacks, the renowned neurologist, author, and educator. He was, in his life, celebrated for his contributions to the understanding of the human brain and his ability to communicate complex scientific concepts to a broader audience. In doing so, he highlighted the profound impact of neurological disorders on human identity and experience. His library is a reflection of this remarkable polymath's questing mind. Light wear to extremities, spine fading on dj, else tight, bright, and unmarred. 8vo, xx, 324pp+Illus (b/w). Yellow cloth with bookplate on ep, price tag. Very Good in Very Good Dustjacket.…

Zustand: Good. 8vo. [48 pp.]. Very Good. Soft Covers. Pages fine. B&W plates throughout.

ALL UK PARCELS SENT TRACKED! ALL OVERSEAS PARCELS SENT AIRMAIL, TRACKED! (s/hand, Paperback, 1982). (1981) 1982 2nd edition. Stapled 8vo paperback (150 x 230mm). Ppvi,61. B/w photographs, illustrations. Cream card covers. Tanned and slightly used but a good second-hand copy. Includes detailed scale diagrams of the construction of hack boxes and towers, as well as identifying location sites and how to reach them. .…

ALL UK PARCELS SENT TRACKED! ALL OVERSEAS PARCELS SENT AIRMAIL, TRACKED! (s/hand, Paperback, 1987). (1981) 1987 3rd edition. Stapled 8vo paperback (150 x 230mm). Ppvi,62. B/w photographs, illustrations. Cream card covers. Slights marks but a very good copy. Includes detailed scale diagrams of the construction of hack boxes and towers, as well as identifying location sites and how to reach them. .…

Textes en français et en anglais. [5673].