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Tony Leukering

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Everything posted by Tony Leukering

  1. Location, location, location -- always good to mention
  2. First two pix are of a juv Red-shouldered I see no particular reason that the second isn't also a Red-shouldered. If it were a Northern Harrier, the white axillars make it an adult male. However, it doesn't sport the adult-male distinct black wing tip and the wings are just too broad and round-tipped.
  3. This is an immature, so head shape is suspect. However, I'd go with Lesser. I assume that it was actively diving, yes?
  4. 1-3 -- Red-throated Loon 4 -- Red-breasted Merganser 5 -- Razorbill 6 -- Black Scoter, Red-breasted Merganser 7 -- Common Eider
  5. Wingtips extend beyond tail tip -- rules out Least, Semi, Western. The bird is decidedly a Baird's.
  6. Both terms come from Brits. Swallows have forked tails, martins have square tails. Then Brits came to the New World and screwed things up (e.g., with robins, chats, blackbirds, etc.). What are called Bank Swallows in Canada and the US are Sand Martins in the UK. There is no taxonomic meaning in the two words.
  7. Where? Residents in the se. US should be setting up shop now.
  8. Swifts cannot perch horizontally (as on branches or wires), they must cling to vertical surfaces (see here). Swallows are pretty straightforward to ID. Pay attention to head pattern and color; also size. The only swallows on the Yucatan that fit the first bird's dull head pattern and coloration are Gray-breasted Martin and Northern Rough-winged Swallow.
  9. That bird is a subadult. First-cycle Northern Gannets are dark-headed and dark-winged.
  10. First-cycle Herring -- aged by the very pointed primaries
  11. 2nd and 3rd to last are BAWW. Note the the under-tail coverts on Black-and-white are absolutely distinctive for a warbler (see cropped pic).
  12. Certainly not a juvenile (see here). Also, note eye color; Goldens always have dark eyes. Second-cycle seems right (third calendar year).
  13. Black lateral and orange central crown stripes rule out any thrush. The Great Blue Heron, while a first-cycle bird (that is, in it's roughly first year of life -- as discerned by the mostly blackish crown), it is not a juvenile -- note the multiple generations of feathers in the wings (some brown, some gray). Immature is the term that you want. https://cobirds.org/CFO/ColoradoBirds/InTheScope/87.pdf
  14. First is an adult female, second is a juvenile, sex uncertain.
  15. Reddish has a generally pink base to the larger bill (check your field guide) and lacks Little Blue Heron's purple aspect to the head/neck plumage, instead being rufous.
  16. https://cobirds.org/CFO/ColoradoBirds/InTheScope/87.pdf
  17. Yup. There's nothing remotely similar in the New World.
  18. Very curved bill, no suggestion of streaking below, and Curve-billed is rare in California, particularly away from the Colorado River.
  19. Definitely Russet-backed Thrush (see https://cobirds.org/CFO/ColoradoBirds/InTheScope/62.pdf)
  20. A quick perusal of any North American field guide will show that a large number of species of diving ducks have white wing patches.
  21. I agree with AlexHenry in the inadvisability to put a definitive name on Cacklers that are odd. As he suggested, this could be a Cackler x Lesser Canada, but it could also be a Richardson's x Taverner's Cackler, with not knowing the sex of the bird being, perhaps, the largest part of uncertainty. Do the apparently large size and thin bill point to Canada genes? Quite possibly, probably, if the bird is a female.
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