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Tony Leukering

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Everything posted by Tony Leukering

  1. Female Brown-headed Cowbird. Immature males look like males (except for one row of lesser coverts on the underside of the wing) before they migrate very far.
  2. Ah, moving to Paraguay could help in that regard.
  3. The wings are too black for any Haemorhous finch. In fact, they're black enough to identify it as a male, regardless of the other coloration.
  4. The tail is too short on the first bird for it to be a Vesper. The angle/posture could easily be hiding the central crown stripe. Birds have fine-tuned control of how feathers lie and often hold the lateral crown feathers higher than the centrals.
  5. Immature Common Gallinule -- once they become adults, they always have bright red bills (see Dec pix here).
  6. https://cobirds.org/CFO/ColoradoBirds/InTheScope/82.pdf
  7. I cropped out the tails in both pix and lightened. No obvious white tail bands and I can see a reddish-orange with dark bands.
  8. The odd bird out is, indeed, an immature Glaucous-winged. I'd go with a Cook Inlet Gull (Herring x Glaucous-winged) for the star of the show. 1) The underside of the wingtip is too pale for a pure Herring 2)The bird is too big with a too-big bill that is not all or virtually all black for Thayer's ["Iceland Gull (Thayer's)" in eBird parlance] 3) The tail is too dark and too patterned for a pure Glaucous-winged. See here, somewhere, for a similar bird or two.
  9. The first bird is probably an alternate-plumaged or formative-plumaged male Mallard. I agree with Gadwall on the second.
  10. note blue legs, which is typical of vireos, but of few other species
  11. Decidedly -- green in head, white in tail; overall dark coloration
  12. Flank streaking is laid over white; both Purple and Cassin's have such laid over pink/red.
  13. https://cobirds.org/CFO/ColoradoBirds/InTheScope/44.pdf Accipiters do not have dark throats, nor do they have wide, dark malar stripes.
  14. Immature (not juvenile) Snow Goose -- note that some of those inner wing covert are all white, rather than dark-centered as on the outer coverts -- that means that it has replaced some of the juvenile feathering, which then means that it is no longer a juvenile.
  15. Golden Eagles never have extensively white wing linings. Any white in the wing is usually restricted to a well-defined patch at the bases of the inner primaries, occasionally extending into the secondaries (see here). Many immature Balds have white on the inner 1-3 primaries that extends nearly to the tips of those feathers, as in, particularly, your first bird.
  16. Immature Herring -- there should be no juveniles of either Ring-billed or Herring in December, much less in April.
  17. https://cobirds.org/CFO/ColoradoBirds/InTheScope/76.pdf
  18. The bird is an adult, so the pale bill rules out the two smaller jaeger species. Additionally, the dark of the top of the head extends well down the face and below the gape, again ruling out the two smaller jaeger sp. The bird's center of gravity (COG; deepest point of the belly) is centered on the wings, which strongly suggests Pom, definitely rules out Long-tailed. Some big female Parasitics can approach this look, but their COGs tend to be forward of the center of the wing, but still behind the leading edge of the wing.
  19. Leg color easily rules out an adult Iceland. Merlin makes mistakes -- some quite unfortunate.
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