• 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. MJB

    Hirundinidae

    I understand that Lombardo et al 2022 are concentrating on rustica sspp and whether any are invalid, but they don't make it clear in the text how closely related other Hirundo spp (except H. aethiopica) are related to H. rustica, their wording suggesting that the African group are indeed pretty...
  2. MJB

    Hirundinidae

    I don't get that conclusion from the paper, I must admit. Re these two groups, the separation dates are estimated at to have split into two major phylogenetic branches, "which might have diverged approximately 100 thousand years ago (Kya) and geographically correspond to Europe-Middle East and...
  3. MJB

    Hirundinidae

    From the paper: "The strong differentiation in genetically distinct but morphologically cryptic lineages within R. diluta is in stark contrast with the lack of any phylogeographic structure in its sister species, the collared sand martin R. riparia, in our study region." That suggests that the...
  4. MJB

    Hirundinidae

    Approximately 1180 km between the single specimen of Red Sea Cliff Swallow and the Awash birds... My long-shot bet for a remote nest site for the former, should it be a valid taxon and still exist, are the cliffs on or near the south bank of the Nile west of Abu Hamad, centred on 19.52N...
Back
Top