File:Characters of age, sex and sexual maturity in Canada geese (1962) (19967687814).jpg

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Title: Characters of age, sex and sexual maturity in Canada geese
Identifier: charactersofages49hans (find matches)
Year: 1962 (1960s)
Authors: Hanson, Harold C. (Harold Carsten), 1917-
Subjects: Canada goose; Birds
Publisher: Urbana
Contributing Library: University of Illinois Urbana-Champaign
Digitizing Sponsor: University of Illinois Urbana-Champaign

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Fig. 4. — Dorsal view of lower i)ack and tail of a lesser Canada goose, Branta canudcnsin purvipes, shot at Perry Ri\cr, Northwest Territories, on July 3, 1949. The faded, pointed primaries of the immature plumage eontrast with the black, adult-type tail feathers. Fig. .3. — Primary feathers of an adult Canada goose, A, and an immature, B, in winter. Feather tips of the adult are rounded; those of the iuuiiature are pointed. tilt' migration period, tlic last half of April and the first half of .May. Most yearlings retained some im- mature type tail feathers until the onset of the moll. Tlie above findings apply partieiilarly to Branlu caiuulcnsis interior of the Missi,ssippi Flyway. That they do not apply equally well to all races of Canada geese heeame apparent in late Jannar\', 1962, when 100 individuals of the subspecies B. c. maxima, the giant Canada goose, were examined by the writer at their major wintering area, the city park of Rt)ehester, Minnesota, and the nearby surrounding eoiuitr\side. Plumage characters of the immature B. c. maxima at Rochester re\'ealed these geese to be in a much more advanced stage of development at a comparable date than the immatures of B. c. interior in southern llli I nois. The tail molt was especially well ad\'anced in \ the Minnesota birds; at least 5 of the 40 immatures I examined had a complete set of adult-type tail fcath-

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https://www.flickr.com/photos/internetarchivebookimages/19967687814/

Author Internet Archive Book Images
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Volume
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49
Flickr tags
InfoField
  • bookid:charactersofages49hans
  • bookyear:1962
  • bookdecade:1960
  • bookcentury:1900
  • bookauthor:Hanson_Harold_C_Harold_Carsten_1917_
  • booksubject:Canada_goose
  • booksubject:Birds
  • bookpublisher:Urbana
  • bookcontributor:University_of_Illinois_Urbana_Champaign
  • booksponsor:University_of_Illinois_Urbana_Champaign
  • bookleafnumber:11
  • bookcollection:biodiversity
  • BHL Collection
  • BHL Consortium
Flickr posted date
InfoField
15 August 2015

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current01:10, 18 September 2015Thumbnail for version as of 01:10, 18 September 20151,950 × 1,624 (522 KB)Fæ (talk | contribs)== {{int:filedesc}} == {{subst:chc}} {{information |description={{en|1=<br> '''Title''': Characters of age, sex and sexual maturity in Canada geese<br> '''Identifier''': charactersofages49hans ([https://commons.wikimedia.org/w/index.php?title=Special%3...

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