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Coming In For A Landing. My friend, part of a local murder, is checking to see if I am far enough away from the peanut he is eyeing to make a safe landing. <br /> On the leading edge of the wing you can see a group of small feathers called the alula. Recent, 2015, studies using digital particle image velocimetry have determined that the alula causes a streamwise vortex increasing the lift force while enhancing the manoeuvrability when landing or flying at high angles of attack. The alula acts very similar to the leading edge slat of an airplane. <br /> <a href="https://www.nature.com/articles/srep09914" rel="nofollow">https://www.nature.com/articles/srep09914</a> Canada,Corvus caurinus,Geotagged,Northwestern crow,Winter Click/tap to enlarge Promoted

Coming In For A Landing.

My friend, part of a local murder, is checking to see if I am far enough away from the peanut he is eyeing to make a safe landing.
On the leading edge of the wing you can see a group of small feathers called the alula. Recent, 2015, studies using digital particle image velocimetry have determined that the alula causes a streamwise vortex increasing the lift force while enhancing the manoeuvrability when landing or flying at high angles of attack. The alula acts very similar to the leading edge slat of an airplane.
https://www.nature.com/articles/srep09914

    comments (3)

  1. View Christine Young's profile
    Christine Young
    Lion
    View Lion class
    Crows are so much fun to watch. Is this one part of the group that has visited you in the past? Posted 5 years ago
    1. View gary fast's profile
      gary fast
      Lion
      View Lion class
      Christine, I have to say that this murder has grown in number the last little while. It was in October just two or three individuals and has now grown to ten of my black feathered friends. All I have to do is walk outside the house and coming back inside there are then four or five crows standing on the deck railing. It is fun to watch what seem to be the “pairs” communicating with each other through touching and mutual preening. They are interesting birds, indeed. Posted 5 years ago
      1. View Christine Young's profile
        Christine Young
        Lion
        View Lion class
        So neat! Posted 5 years ago

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The Northwestern crow

The northwestern crow is an all-black passerine bird of the crow genus native to the northwest of North America. It is very similar to the more western forms of the widespread American crow , but it averages slightly smaller with proportionately smaller feet and a slightly more slender bill. This taxon is reliably identified by range only.

Info 9 0
Similar species: Perching Birds
Species identified by gary fast
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By gary fast

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Uploaded Jan 9, 2020. Captured Jan 8, 2020 12:36 in 315 Whaletown Rd, Whaletown, BC V0P 1Z0, Canada.
country flag of Canada Explore Canada 1,925 859 0
  • E-M5MarkII
  • f/6.3
  • 1/500s
  • ISO1600
  • 40mm
Captured in the winter. More winter photos.