Blankakrona emberizo

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Blankakrona emberizo
Blankakrona emberizo
Blankakrona emberizo

Biologia klasado
Regno: Animaloj Animalia
Filumo: Ĥorduloj Chordata
Klaso: Birdoj Aves
Ordo: Paseroformaj Passeriformes
Familio: Emberizedoj Emberizidae
Genro: Zonotrichia
Specio: Z. leucophrys
Zonotrichia leucophrys
(Forster, 1772)
Konserva statuso
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Konserva statuso: Malplej zorgiga
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La blankakrona emberizo, ankaŭ nomata blankakrona zonotriĥoblankakrona plumzonulo (Zonotrichia leucophrys) estas mezgranda birdospecio membro de la grupo de Amerikaj paseroj indiĝena de Nordameriko kaj membro de la genro de zonotriĥoj, kiu enhavas speciojn de brunstriecaj dorsoj kaj distingaj kapobildoj.

Aspekto[redakti | redakti fonton]

Otavo, Ontario

Plenkreskuloj estas 18 cm longaj kaj havas nigrablankajn striojn en kapo, grizajn vizaĝon, nukon, kolzonon kaj subajn partojn, brunajn striecajn suprajn partojn kaj longan brunecan voston. La flugiloj estas brunaj kun strioj kaj la kruroj estas rozkoloraj. Ties bekoj estas rozkoloraj aŭ flavaj kun nigrecaj supra bordo kaj pinto. La okulaj irisoj estas malhelbrunaj kaj estas tre mallarĝa blanka okulringo videbla nur en suba duono ĉar supra koincidas kun blanka superokula strio. Ili estas similaj laŭ aspekto al la Blankgorĝa emberizo sed havas nek la blankajn gorĝajn markojn nek la flavajn bridomakulojn.

Resume oni povas diri, ke temas pri helgriza birdo kun brunecaj supraj partoj kaj tre rimarkinda nigrablanka kontrasta kronobildo konsista el centra mallarĝa blanka kronostrio (de kio venas la komuna nomo Blankakrona emberizo), kaj ambaŭflanke unue larĝa nigra subkrona strizono, blanka larĝa superokula strizono (de kio venas la latina scienca nomo leucophrys, kunmetaĵo de du radikoj de la antikva greka signife respektive “blanka” kaj “brovo”, kio tradukeblus per Blankabrova emberizo) kiu komencas per grizeca brido kaj fina fajna mallarĝa traokula strio ankaŭ post grizeca brido. Tiu nigrablanka kronobildo estus sufiĉa kialo ankaŭ por alternativa nomo Blankanigrakrona emberizo, ne tre taŭga pro troa longeco.

Reproduktado[redakti | redakti fonton]

Ties reprodukta habitato estas arbustecaj areoj de norda Kanado kaj okcidenta Usono. Ili nestumas ĉu malalte en arbustoj aŭ surgrunde sub arbustoj kaj la ino demetas 3-5 brunmarkajn grizajn aŭ verdecbluajn ovojn.

Subspecioj[redakti | redakti fonton]

Estas 5 nune agnoskataj subspecioj de la Blankakrona emberizo (pugetensis, gambelii, nuttalli, oriantha, kaj leucophrys), varie pri migranta kutimaro kaj reprodukta habitato. La nuttalla subspecio estas de konstantaj loĝantaj birdoj en Kalifornio, dum la gambela subspecio povas migri tiom for kiom ĝis la Arkta Cirklo dum la somera reprodukta sezono. Nordaj birdoj migras al suda Usono.

Vaganteco[redakti | redakti fonton]

La Blankakrona emberizo estas tre rara vaganto al Okcidenta Eŭropo. Unu estis en Graflando Cork, Irlando maje de 2003.[1] Alia troviĝis en Norfolk, Anglio januare de 2008.[2] Ankaŭ junulo estis observata en Ona, Norvegio oktobre de 2009.[3] Junulo estis vidata en Surrey, Anglio en majo de 2010.

Kutimaro[redakti | redakti fonton]

Tiuj nearktisaj birdoj manĝas surgrunde aŭ en malalta vegetaĵaro, sed foje faras mallongajn flugojn por kapti flugantajn insektojn. Ili manĝas ĉefe semojn, aliajn plantopartojn kaj insektojn. Vintre ili ofte manĝas are.

Migrada alerteco[redakti | redakti fonton]

La Blankakrona emberizo estas konata pro sia natura alerteca mekanismo, kiu permesas ĝin resti veka dum ĝis du semajnoj dummigrado.[4] Tiu efiko estis studata por eblaj homaj aplikoj, kiaj lacego pro laborvicoj aŭ kamionŝoforado.[5][6][7]

Bildoj[redakti | redakti fonton]

Referencoj[redakti | redakti fonton]

  1. Hussey, Harry (2003) The White-crowned Sparrow in County Cork. Birding World 16(5): 203-5
  2. Rare bird found in coastal garden. BBC News Website (2008-01-09). Alirita 2008-01-09.
  3. American mob-sparrow declares war on Norway. Arkivita el la originalo je 2009-10-07. Alirita 2010-12-31.
  4. It's Wake-Up Time. Wired Website (2003-11-01). Alirita 2010-07-28.
  5. Migratory Sleeplessness in the White-Crowned Sparrow (Zonotrichia leucophrys gambelii). PLoS Biology (2004-07-13). Alirita 2010-07-28.
  6. Alaska sparrow migration mystery. Far North Science Website (2007-11-06). Alirita 2010-07-28. Arkivita kopio. Arkivita el la originalo je 2011-07-10. Alirita 2010-12-31.
  7. Circadian and Masking Control of Migratory Restlessness in Gambel's White-Crowned Sparrow (Zonotrichia leucophrys gambelii). Journal of Biological Rhythms (2008-02-01). Alirita 2010-07-28.

Literaturo[redakti | redakti fonton]

Libroj[redakti | redakti fonton]

  • Chilton, G., M. C. Baker, C. D. Barrentine, and M. A. Cunningham. 1995. White-crowned Sparrow (Zonotrichia leucophrys). In The Birds of North America, No. 183 (A. Poole and F. Gill, eds.). The Academy of Natural Sciences, Philadelphia, and The American Ornithologists’ Union, Washington, D.C.
  • Kroodsma DE, Baker MC, Baptista LF & Petrinovich L. (1985). Vocal "dialects" in Nuttall's white-crowned sparrow. In Johnston, R F [Editor] Current Ornithology 103-133, 1985. Plenum Press, 233 Spring Street, New York, New York.

Tezoj[redakti | redakti fonton]

  • Banks RC. Ph.D. (1962). GEOGRAPHIC VARIATION OF THE WHITE-CROWNED SPARROW, ZONOTRICHIA LEUCOPHRYS. University of California, Berkeley, United States, California.
  • Baptista LF. Ph.D. (1972). DEMES, DISPERSION AND SONG DIALECTS OF SEDENTARY POPULATIONS OF THE WHITE-CROWNED SPARROW (ZONOTRICHIA LEUCOPHRYS NUTTALLI). University of California, Berkeley, United States, California.
  • Blanchard BD. Ph.D. (1939). ENVIRONMENT AND ANNUAL CYCLE IN THE WHITE-CROWNED SPARROWS (ZONOTRICHIA LEUCOPHRYS) OF THE PACIFIC SEABOARD. University of California, Berkeley, United States, California.
  • Chilton GD. Ph.D. (1993). Song dialects and mate choice by white-crowned sparrows, Zonotrichia leucophrys. University of Calgary (Canada), Canada.
  • Dobson CW. Ph.D. (1973). BEHAVIOR OF THE WHITE-CROWNED SPARROW (ZONOTRICHIA LEUCOPHRYS NUTTALLI) IN A SONG-REINFORCED LABORATORY OPERANT TASK. University of California, Riverside, United States, California.
  • Fugle GN. Ph.D. (1983). BEHAVIORAL DOMINANCE IN WINTERING WHITE-CROWNED SPARROWS, ZONOTRICHIA LEUCOPHRYS GAMBELII: ITS CORRELATES AND CONSEQUENCES. University of California, Santa Barbara, United States, California.
  • MacDougall-Shackleton EA. Ph.D. (2000). Song dialects, mate choice and population structure in mountain white-crowned sparrows (Zonotrichia leucophrys oriantha). Princeton University, United States, New Jersey.
  • Norment CJ. Ph.D. (1992). The comparative breeding ecology of the Harris' sparrow (Zonotrichia querula) and white-crowned sparrow (Zonotrichia leucophrys) in the Northwest Territories, Canada. University of Kansas, United States, Kansas.
  • Patterson TL. Ph.D. (1977). THE WHITE-CROWNED SPARROW (ZONOTRICHIA LEUCOPHRYS NUTTALLI): REPRODUCTIVE SUCCESS, ECOLOGY AND TERRITORIAL BEHAVIOR. University of California, Riverside, United States, California.
  • Ross AE. Ph.D. (1985). SOCIAL DOMINANCE HIERARCHIES IN CAPTIVE GROUPS OF WHITE-CROWNED SPARROWS, ZONOTRICHIA LEUCOPHRYS LEUCOPHRYS (STATUS DETERMINANTS, STATUS SIGNAL, AGONISTIC BEHAVIOR, INTRASPECIFIC COMPETITION, DIFFERENTIAL DISTRIBUTION). Clemson University, United States, South Carolina.

Artikoloj[redakti | redakti fonton]

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  • Baker MC, Cunningham MA & Thompson ADJ. (1984). Cultural and Genetic Differentiation of 2 Subspecies of White-Crowned Sparrow Zonotrichia-Leucophrys. Condor. vol 86, no 4. p. 359-367.
  • Baker MC, Mewaldt LR & Stewart RM. (1981). Demography of White-Crowned Sparrows Zonotrichia-Leucophrys-Nuttalli. Ecology. vol 62, no 3. p. 636-644.
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  • Baker MC, Thompson DB & Sherman GL. (1981). Neighbor Stranger Song Discrimination in White-Crowned Sparrows Zonotrichia-Leucophrys-Nuttalli. Condor. vol 83, no 3. p. 265-267.
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  • Baptista LF. (1999). Field and laboratory studies of the biology of the White-crowned Sparrow. Poultry & Avian Biology Reviews. vol 10, no 2. p. 101-107.
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  • Baptista LF & King JR. (1980). Geographical Variation in Song and Song Dialects of Montane White-Crowned Sparrows Zonotrichia-Leucophrys-Oriantha. Condor. vol 82, no 3. p. 267-284.
  • Baptista LF & Morton ML. (1981). Interspecific Song Acquisition by a White-Crowned Sparrow. Auk. vol 98, no 2. p. 383-385.
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  • Baptista LF & Petrinovich L. (1984). Social Interaction Sensitive Phases and the Song Template Hypothesis in the White-Crowned Sparrow Zonotrichia-Leucophrys-Nuttalli. Animal Behaviour. vol 32, no 1. p. 172-181.
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  • Chilton G. (2003). Cultural evolution and song stereotypy in an isolated population of Montane white-crowned sparrows (Zonotrichia leucophrys oriantha). Bird Behavior. vol 15, no 2. p. 53-63.
  • Chilton G & Galloway TD. (1995). Fleas (Siphonaptera: Ceratophyllidae) from nests of white-crowned sparrows Zonotrichia leucophrys) in southwestern Alberta, Canada. Canadian Entomologist. vol 127, no 3. p. 443-444.
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  • Heinemann D. (1981). Song Dialects Migration and Population Structure of Puget Sound White-Crowned Sparrows Zonotrichia-Leucophrys-Pugetensis. Auk. vol 98, no 3. p. 512-521.
  • Hill BG & Lein MR. (1985). The Non-Song Vocal Repertoire of the White-Crowned Sparrow Zonotrichia-Leucophrys. Condor. vol 87, no 3. p. 327-335.
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  • Kern MD. (1984). Racial Differences in Nests of White-Crowned Sparrows Zonotrichia-Leucophrys-Leucophrys. Condor. vol 86, no 4. p. 455-466.
  • King JR. (1986). The Daily Activity Period of Nesting White-Crowned Sparrows Zonotrichia-Leucophrys in Continuous Daylight at 65 Degrees North Compared with Activity Period at Lower Latitudes. Condor. vol 88, no 3. p. 382-384.
  • King JR & Hubbard JD. (1981). Comparative Patterns of Nestling Growth in White-Crowned Sparrows Zonotrichia-Leucophrys. Condor. vol 83, no 4. p. 362-369.
  • Lein MR & Corbin KW. (1990). Song and Plumage Phenotypes in a Contact Zone between Subspecies of the White-Crowned Sparrow Zonotrichia-Leucophrys. Canadian Journal of Zoology. vol 68, no 12. p. 2625-2629.
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  • Morton ML. (1992). Control of postnuptial molt in the mountain white-crowned sparrow: A perspective from field data. Ornis Scandinavica. vol 23, no 3. p. 322-327.
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