. Die kanadische Feld - naturforscher. Januar, 1948] Die kanadische Field-Naturalist 43. Teil einer Herde von Seetaucher (Gavja Immers) auf Datei See, Manitoba. Juni 24, 1946. Die ganze Herde gezählt über 100 Vogelarten. Foto von Dr. J.M.Harrison. Vor kurzem Dr. J. M. Harrison von Ottawa, verbal einige interessante Hinweise zum Sommer Scharen von loons in ihrem Zuchtprogramm Bereich kommuniziert. Dr. Harrison's Arbeit in re-cent Sommer hat in den Flin Flon Bereich der zentralen westlichen Manitoba. Dies ist vor dem Kambrium Land, gespickt mit vielen kleinen Seen und ein paar grössere. Loons Nest häufig durch die Gegend

• Bildanbieter: Book Worm / Alamy Stock Foto
• Bild-ID: RG2W1F
• Dateigröße: 7,2 MB (613,3 KB Komprimierter Download)
• Freigaben (Releases): Model - nein | Eigentum - nein
• Format: 2938 x 851 px | 24,9 x 7,2 cm | 9,8 x 2,8 inches | 300dpi

Weitere Informationen

Dieses Bild ist ein gemeinfreies Bild. Dies bedeutet, dass entweder das Urheberrecht dafür abgelaufen ist oder der Inhaber des Bildes auf sein Urheberrecht verzichtet hat. Alamy berechnet Ihnen eine Gebühr für den Zugriff auf die hochauflösende Kopie des Bildes.

Dieses Bild kann kleinere Mängel aufweisen, da es sich um ein historisches Bild oder ein Reportagebild handel

. The Canadian field-naturalist. January-February, 1948] The Canadian Field-Naturalist 43. Part of a flock of loons (Gavja immer) on File Lake, Manitoba. June 24, 1946. The whole flock numbered over 100 birds. Photograph by Dr. J. M. Harrison. Recently Dr. J. M. Harrison of Ottawa, communicated verbally some interesting notes on summer flocking of loons in their breeding range. Dr. Harrison's work in re- cent summers has been in the Flin Flon area of central western Manitoba. This is Pre- cambrian country, dotted with many small lakes and a few larger ones. Loons nest commonly through the area; usually a pair has a wide area about its nest exclusively for itself. But on two large clear lakes in which the fishing is especially good, Dr. Harrison has seen loons congregate in large flocks in July 1943, and June and July 1946. The lakes are Lake Athapapaskow 8 miles east of Flin Flon and File Lake, about 50 miles east of Flin Flon. He has seen con- gregations of up to 60 birds on the former and of more than 100 birds on the latter. The loons were seen flying to the lakes in the early morning; during the day the size of the flock increased, until about 3 P.M. when the maximum number of birds was present, after which the birds began to leave the lakes. Apparently only the few local nesting birds spent the night on the lakes. There seemed to be little coming and going during the day, and no signs of the loons carrying fish from the lakes were seen; the birds appeared to come to feed. Though a number of pairs of loons were nesting on these lakes (the earliest date on which young were noted in 1946 was on June 19) no aggressive behavior was seen. This behavior suggests several things: that the adults may congregate at good fishing places to get food for the young, though against this is the fact that no food was seen to be carried; that these are non- breeding birds, such as Munro mentions, that congregate to feed, though if this were the case one wonders why they would leav

Stockbilder mithilfe von Tags suchen

• bookcentury1900
• bookcolle