Readers’ wildlife

Here’s a nice set of photos from several batches I still have from John Avise, an evolutionary biologist at UC Irvine. His notes and IDs are indented:

Here are about another dozen miscellaneous photos from my collection.  This batch could be entitled “odd pairings”.
Toy glider (note the upswept wingtips:

Snowy Egret, Egretta thula; (note the upswept wingtips):

Same toy glider (note the black wingtips):

White Ibis, Eudocimus albus (note the black wingtips):

Common Raven (Corvus corax) chasing American Crow (Corvus brachyrhynchus); note the different sizes and silhouettes of these two species:

Black-necked Stilt (Himantopus mexicanus) and American Avocet (Recurvirostra americana):

American Wigeon (Anas americana) and Eurasian Wigeon (Anas penelope)

Blue-winged Teal (Anas discors) and Green-winged Teal (Anas crecca):

Western Grebe (Aechmophorus occidentalis) and Red-necked Grebe (Podiceps grisegena):

Pectoral Sandpiper (Caladris melanotos, to the left) and Lesser Yellowlegs (Tringa flavipes), plus their reflections:

Marbled Godwit (Limosa fedoa, to the rear) and Whimbrel (Numenius ohaeopus); note the bill curvatures:

12 Comments

  1. Posted March 12, 2020 at 8:35 am | Permalink

    Great contrasts!

  2. Charles A Sawicki
    Posted March 12, 2020 at 8:54 am | Permalink

    Thanks great photos!

  3. Posted March 12, 2020 at 9:22 am | Permalink

    These are great pairings! Thanks for sharing these!

  4. rickflick
    Posted March 12, 2020 at 10:03 am | Permalink

    Great comparisons!

  5. Posted March 12, 2020 at 10:51 am | Permalink

    Great juxtapositions, Birdman! Those are all terrific pictures of course.

  6. Posted March 12, 2020 at 12:29 pm | Permalink

    What’s the connection between “widgeon” and “pidgeon”?

  7. Posted March 12, 2020 at 12:44 pm | Permalink

    What a great batch of pictures! The raven chasing the crow is stunning.

  8. sted24
    Posted March 12, 2020 at 1:29 pm | Permalink

    Very nice comparison series.

    In the glider/egret upswept wingtips case there is an obvious aeronautical explanation, wingtip vortices. Air pressure below an aerofoil is greater than that above. At the wingtips the higher pressure air below pushes upwrds to create a vortex, which increases drag. Upward curved wingtips (or winglets on airliners) help reduce this.

    But black wingtips in the glider/Ibis case? I can’t see any benefit, other than it looks cool!

    Here’s a dramatic example of the vortices left in a C-17 Globemaster III’s wake:

    • Posted March 13, 2020 at 9:22 am | Permalink

      The black pigment adds strength to feathers. I don’t know about the glider.

  9. Mark R.
    Posted March 12, 2020 at 2:13 pm | Permalink

    Those glider/bird comparisons were novel and very cool.
    Teals are exceedingly beautiful.

  10. Frank Bath
    Posted March 12, 2020 at 2:19 pm | Permalink

    The stilts is a great picture.

  11. Posted March 12, 2020 at 3:03 pm | Permalink

    Beautiful work, John!


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