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Strix nebulosa


Strix nebulosa
Photo Information
Copyright: Mircea Costina (mirceax) Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 229 W: 49 N: 1356] (6261)
Genre: Animals
Medium: Color
Date Taken: 2008-02-24
Categories: Birds
Camera: Nikon D50, Sigma 70-300mm F4-5.6 DG Macro
Exposure: f/5.6, 1/250 seconds
Details: (Fill) Flash: Yes
Photo Version: Original Version
Date Submitted: 2008-02-25 9:30
Viewed: 4085
Favorites: 1 [view]
Points: 36
[Note Guidelines] Photographer's Note
The Great Grey Owl or Lapland Owl (Strix nebulosa) is a very large owl, distributed across the Northern Hemisphere.

Adults have a big, rounded head with a grey face and yellow eyes with darker circles around them. The underparts are light with dark streaks; the upper parts are grey with pale bars. This owl does not have ear tufts and has the largest "facial disc" of any raptor.

In terms of length, the Great Grey Owl rivals the Eurasian Eagle Owl and the Blakiston's Fish Owl as the world's largest owl. However, much of its size is deceptive, since this species' fluffy feathers, long tail and large head obscure a body lighter than most other large owls. The length may range from 61 to 84 cm (24 to 33 in), averaging 72 cm (27 in) for females and 67 cm (26 in) for males. The wingspan can exceed 152 cm (60 in), but averages 142 cm (56 in) for females and 140 cm (55 in) for males. The adult weight can range from 700 to 1800 grams (1½ to 4 lb), averaging 1290 grams (2 lb 14 oz) for females and 1000 g (2 lb 3 oz) for males.

They breed in North America from Lake Superior to the Pacific coast and Alaska, and from Scandinavia across northern Asia. They are permanent residents, but may move south and southeast when food is scarce. A small population, estimated at less than 100 birds, occurs in the Sierra Nevada mountains of California. This population is the southernmost population of the species' range.

Their breeding habitat is the dense coniferous forests of the taiga, near open areas, such as meadows or bogs. Great grey owls do not build nests, so typically use nests previously used by another large bird, such as a raptor. They will also nest in broken-top trees and cavities in large trees. Nesting may occur from March to May. 4 eggs is the usual clutch size. Eggs average 42.7 mm wide and 53.5 mm long (1.68 by 2.11 in). The incubation period is about 30 days, ranging from 28 to 36 days. Brooding lasts 2 to 3 weeks, after which the female starts roosting on a tree near nests. The young jump or fall from the nest at 3 to 4 weeks, and start to fly 1 to 2 weeks after this. Most offspring remain near their natal sites for many months after fledging.

The abundance of food in the area usually affects the number of eggs a female lays, which is quite common in owl species. If food is scarce, they may travel a short distance to find more prey. However, they do not migrate.

These birds wait, listen and watch for prey, then swoop down; they also may fly low through open areas in search of prey. Their large facial disks focus sound, and the asymmetrical placement of their ears assists them in locating prey. On the nesting grounds, they mainly hunt at night and near dawn and dusk; at other times, they are active mostly during the night. They have excellent hearing, and may capture prey moving beneath 60 cm (2 feet) of snow in a series of tunnels. These owls can crash through snow that could support the weight of a 180-pound person. Unlike the more versatile eagle and horned owls, Great Grey Owls reply almost fully upon small rodents, with voles being their most important food source. Locally, alternative prey animals (usually comprising less than 20% of prey intake) include hares, moles, shrews, weasels, thrushes, grouse, Gray Jays, small hawks and ducks. Great Grey Owl juveniles may themselves fall prey to bears, fishers, and large hawks, especially Northern Goshawks; while adults may fall prey to Bubo owls and lynxes.

The call of the adult is a series of very deep, rhythmic whoos, which is usually given in correlation to their territories or in interactions with their offspring. At other times, adults are normally silent. The young may chitter, shriek or hiss.

The harvest of timber from the Great Grey Owl's habitat is, perhaps, the greatest threat to this species. Intensified timber management typically reduces live and dead large-diameter trees used for nesting, leaning trees used by juveniles for roosting before they can fly, and dense canopy closures in stands used by juveniles for cover and protection. If perches are not left in clearcuts, Great Gray Owls cannot readily hunt in them. Although human-made structures (made specifically for use by this species) have been utilized by these owls, the species is far more common in area protected from logging. Livestock grazing in meadows also adversely affects Great Gray Owls, by reducing habitat for preferred prey species.

source:http://en.wikipedia.org

CeltickRanger, vanderschelden, Arjun, NinaM, crs, cicindela, darwin, sandpiper2, boreocypriensis has marked this note useful
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ThreadThread Starter Messages Updated
To vanderschelden: wildlifemirceax 2 02-25 10:05
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Critiques [Translate]

salut Mircea

quelle belle close-up de cette Chouette Lapone avec ses yeux
jaunes et brillant de hibou, WOW ! excellente luminosité de l'image,
excellents détails des textures de son plumage, superbe eye-contact

TFS

Asbed

Hello Mircea,
A big fellow...and you got em really good.
Is this a wild one?
Well done anyway..
TFS
Annick

  • Great 
  • Arjun Gold Star Critiquer/Gold Note Writer [C: 358 W: 7 N: 1237] (7593)
  • [2008-02-25 9:40]

hi mircea,
amazing portrait..the eyes are ferocious.
TFS

Hello Mircea
Your portrait of the Great Grey Owl is awesome. He looks so majestic sitting in a tree. His large eyes are so expressive and the detail of this feathers is so sharp, it's like looking out a window. Welldone.
TFS Janice

  • Great 
  • Zeno Gold Star Critiquer/Gold Note Writer [C: 483 W: 0 N: 1345] (10867)
  • [2008-02-25 10:49]

Hi Mircea,

I like this owl with the big staring eyes. Its good to see this bird in a natural environment. Very sharp photo with great colors.
TFS.

regards,
Zeno.

  • Great 
  • joska Gold Star Critiquer/Gold Note Writer [C: 806 W: 0 N: 4092] (22535)
  • [2008-02-25 11:00]

Salut! Inca o poza de invidiat!
Joska

  • Great 
  • crs Gold Star Critiquer/Gold Note Writer [C: 469 W: 0 N: 922] (3551)
  • [2008-02-25 11:54]

Buna Mircea,

Foarte interesanta fotografia ta. Ochii bufnitei sunt fascinanti iar faptul ca ai lumina putina pe fata pasarii ii face si mai impresionanti.

Felicitari,
Cristian

  • Great 
  • rdfoto Gold Star Critiquer/Gold Note Writer [C: 372 W: 0 N: 719] (3295)
  • [2008-02-25 12:36]

Bonjour Mircea
Magnifique capture, excellente gestion de l'exposition, netteté, couleurs et très belle attitude du sujet. Félicitations
Amicalement Robi

  • Great 
  • darwin Gold Star Critiquer [C: 259 W: 0 N: 403] (1401)
  • [2008-02-25 16:42]

Hi Mircea
Wonderful eyecatching capture of this owl
in his natural envionment
Nice color,light and pose
Great eye contact tfs jon

Hello Mircea!
This is one of the best quality pictures of Strix nebulosa I have ever seen. Great details and sharpness, but my favourite is POV :)
All the best from other side of the Ocean! ;)
Radomir

Wouaw Mircea, quelle prise magnifique !!!
J'adore la pose de cette élégante chouette et le dessin sur son plumage, la mise au point est parfaite et la composition splendide,
bravo
amicalement,
Pat

Je reviens demain avec un joli smiley tout vert

Salut Mircea,

absolut superba aceasta fotografie!

Luca

Hi Mircea

Ahhh, one of my favourite birds, the great grey. Superb image. Perfectly composed and exellent exposure. Great sharpness and plumage detail Love the eye contact, those yellow eyes are great.
Exellent work.

Chris

Splendida immagine di questo stupendo rapace notturno, eccellenti dettagli e i colori con luce radente, bellissima l'ambientazione naturale. Complimenti. Ciao Maurizio

Hello Mircea,

A perfect capture of this beautiful owl,excellent focus, composition and details. I liked its stong eyes friend! Lovely
TFS and Regards,

Bayram

  • Great 
  • NinaM Gold Star Critiquer [C: 773 W: 3 N: 1157] (4077)
  • [2008-02-26 16:34]

Bonjour Mircea, la photo est fantastique et aussi belle que l'oiseau puisse l'être. J'adore la pénombre de cette photo et la lumière bleutée sur l'oiseau. C'est riche, saturé et magnifique. Merci!

Francine

hello Mircea
what a nice capture of interesting looking Strix. Great sharp focus, composition and POV. I like also eye contact, timing and frame. Thanks for sharing, best wishes
Ahmet

  • Great 
  • hibou Gold Star Critiquer/Gold Note Writer [C: 217 W: 1 N: 331] (1629)
  • [2008-02-28 17:31]

Salut Mircea,
Impressionnante cette photo ...Les couleurs sont magnifiques ... et les détails tout autant ... BRAVO et merci de la partager
Donald

I can't offer much in regards of a critique, but I love great grey owls, and this is a very cool picture.

Tom

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