. Gli uccelli di allevamento di Ontario : nidiology e distribuzione. Gli uccelli; uccelli; uccelli. Cigno, Cygnus olor (Gmelin) Nidiology registra 10 nidi in rappresentanza di 5 regioni provinciali. Questa specie è stata istituita come un Feral Breeding Bird in Ontario per più di vent'anni. La maggior parte dei nidi segnalati erano in tifa paludi, sebbene 2 erano sulla riva di un laghetto. La palude nidi erano situate in cattails da 13,5 a 90 m (da 45 a 300 piedi) da riva e sono state poste su stuoie di vegetazione galleggiante, ancorata in piedi cattails, o sul topo muschiato case. Strutture di nido erano grandi tumuli di dead cattai

• Collaboratore: Library Book Collection / Alamy Foto Stock
• ID dell’immagine: RH5JC1
• Dimensioni dei file: 7,1 MB (196,5 KB Download compresso)
• Liberatorie: Modello - no | Proprietà - no
• Dimensioni: 1751 x 1427 px | 29,7 x 24,2 cm | 11,7 x 9,5 inches | 150dpi

Altre informazioni

Questa foto è un'immagine di pubblico dominio, il che significa che il copyright è scaduto o che il titolare del copyright ha rinunciato a tale diritto. Alamy addebita un costo per l'accesso alla copia ad alta risoluzione dell'immagine.

Questa immagine potrebbe avere delle imperfezioni perché è storica o di reportage.

. Breeding birds of Ontario : nidiology and distribution. Birds; Birds; Birds. Mute Swan, Cygnus olor (Gmelin) Nidiology RECORDS 10 nests representing 5 provincial regions. This species has been established as a feral breeding bird in Ontario for more than 20 years. Most of the reported nests were in cattail marshes, although 2 were on the shore of a small pond. The marsh nests were situated in cattails from 13.5 to 90 m (45 to 300 ft) from shore and were placed on mats of floating vegetation, anchored by standing cattails, or on muskrat houses. Nest structures were large mounds of dead cattails. One nest was lined with some down and feathers. Nest diameters were 2 m (6 ft) and nest depths ranged from 20.5 to 61 cm (8 to 24 inches). EGGS 8 nests with 1 to 9 eggs; IE (IN), 4E (IN), 5E (3N), 8E (2N), 9E (IN). Average clutch range 4 to 8 eggs (6 nests). INCUBATION PERIOD No information. EGG DATES 8 nests, 4 April to 29 June (9 dates); 4 nests, 9 May to 22 May. Breeding Distribution The mute swan is kept in captivity in many parts of the province. It also lives in a semi-wild state in parks, where it can be fed and maintained through the winter months. However, feral birds have succeeded in maintaining themselves throughout the winter and such birds began breeding in the wild as early as 1958 (Peck, 1966). Because this species is nonmigratory, it is confined to areas of suitable habitat near the southern Great Lakes where open water is found all winter.. ^ 45. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Peck, George K; James, Ross, 1943-; Royal Ontario Museum. Toronto : Royal Ontario Museum

Parole chiave associate all'immagine

• bookcentury1900
• bookdecade19
• bookleafnumber61
• booksubjectbirds