• Welcome to BirdForum, the internet's largest birding community with thousands of members from all over the world. The forums are dedicated to wild birds, birding, binoculars and equipment and all that goes with it.

    Please register for an account to take part in the discussions in the forum, post your pictures in the gallery and more.
ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

Search results

thxpress_search_the_forum Search Opus
  1. jmorlan

    Lynx-BirdLife Taxonomic Checklist

    Extracted summary of conclusions:
  2. jmorlan

    Lynx-BirdLife Taxonomic Checklist

    HBW Green-backed Heron question. In reviewing the Tobias scoring for Green-backed Heron, their point that splitting Green Heron leaves South American populations conspecific with old world taxa is valid, but their opinion that such an arrangement is "improbable" would benefit from further...
  3. jmorlan

    Lynx-BirdLife Taxonomic Checklist

    Cape York Friarbird The IOC has consistently split the Cape York Friarbird or Hornbill Friarbird (Philemon yorki) from the Helmeted Friarbird (Philemon buceroides). Today I noticed that HBW Alive lumps these two as did the original HBW. I'm looking for an explanation of this; particularly...
  4. jmorlan

    Lynx-BirdLife Taxonomic Checklist

    Yellow-rumped Warbler is a classic case of a presumably stable narrow hybrid zone. It's been looked into a couple of times since the original data was gathered by Hubbard and published in 1969. More recent analysisconcludes that they are separate species, a recommendation adopted by IOC but...
  5. jmorlan

    Lynx-BirdLife Taxonomic Checklist

    Not that I know of. I've written to the HANZAB author to see if there's anything new. But I think the lump by Bock needs to be understood in historical context. Closely related allopatric populations have a taxonomic status that is essentially unknowable. The prevailing view at the time...
  6. jmorlan

    Lynx-BirdLife Taxonomic Checklist

    Seems like the deck is stacked in favor of splitting. Sympatry adds points; intergradation adds points, hybridization adds points, allopatry adds points...
  7. jmorlan

    Lynx-BirdLife Taxonomic Checklist

    How do HBW/Tobias score cryptic species which overlap, but do not hybridize or form intergrades? Birds like Eastern/Western Wood-Pewee or the Trail's Flycatcher species pair? Does the lack of a hybrid zone subtract from the virtually nonexistent diagnosablilty scores in these cases? How can...
  8. jmorlan

    Lynx-BirdLife Taxonomic Checklist

    Yes, this is confusing when authors use the same words to mean different things. As you point out, Short's use of the term "intergrades" is not completely clear, but I think his application of the term is clear. Whether intergrades are the consequence of a hybrid zone in secondary contact, or...
  9. jmorlan

    Lynx-BirdLife Taxonomic Checklist

    Short (Auk: 86:90, 1969) defined semispecies as species which form a zone of overlap and hybridization (or potentially capable of so doing)..." Subspecies "hybridize in a hybrid zone." Now HBW, Tobias, and apparently Helbig and other authors have completely turned the concept of semispecies...
  10. jmorlan

    Lynx-BirdLife Taxonomic Checklist

    Actually they are. They ADD to the score. The existence of a well documented hybrid zone between the two races of Masked Lapwing was used to argue that they should be split. This scoring system would appear to be the opposite of the BSC, if such a thing is possible. My understanding is...
  11. jmorlan

    Lynx-BirdLife Taxonomic Checklist

    Sorry to be late to the party here, but can you point me to the Tobias scoring system and how it was applied to the Masked Plover (Lapwing)? Does the Tobias system ignore well established and documented hybrid zones in determining species validity? TIA.
  12. jmorlan

    Lynx-BirdLife Taxonomic Checklist

    Thank you very much for the link, Laurent. It appears this authority (Shodde et al. 1997) follows the biological species concept except prefers to assign full species status to morphologically distinct allopatric populations. The Rainbow Lorikeet complex (Trichoglossus haematodus) is...
  13. jmorlan

    Lynx-BirdLife Taxonomic Checklist

    So there are no actual published peer reviewed papers to form the basis for these last two splits? I do not have access to this book. Are these splits based on peer reviewed published research? Is this research cited somewhere? To better understand Schodde et al., it would be helpful to know...
  14. jmorlan

    Lynx-BirdLife Taxonomic Checklist

    Thanks. I checked the two references and neither Schweizer et al. (2013) or Joseph et al. (2011) deal with Trichoglossus sp. Lorikeets. TiF doesn't seem to have any additional citations on the subject. Where is all this coming from?
  15. jmorlan

    Lynx-BirdLife Taxonomic Checklist

    Rainbow Lorikeet split I found this. But other than Tobias, there is no authority mentioned for this split. John Boyd has a couple of cryptic citations for a three-way split of Rainbow Lorikeet, but not the newer 6 way split. But where is the list of actual publications? What are...
Back
Top