G'day birding-Aus members
The data you have placed on this list or elsewhere and that which has
been sent to me directly has been used for a paper that has just been
accepted for J. Austn Field Ornithology, which provides a rationale
for why the last emigrants of both species is most often recorded in
southern Australia, whereas the first arrivals are usually recorded
in northern Australia.
The data is now being used to show whether or not there has been a
decline in numbers in both species. As I go through the Atlas
records (First, second and current atlas) I find most records do not
give numbers or approximations of numbers observed. So if you have
sent data to the atlas (no matter how long ago) and you did not
provide the numbers seen, would you please try to find time to send
me (directly) those numbers and the date and I will be able to match
it up.
If you have any old records that were never sent to the atlas I would
also love to hear from you with those data.
Last point: many atlas records were provided with dates that were for
days, weeks or months and so are useless for determining where the
first and last were seen in a particular region. I wowoulduld love
to receive any precise date for old or recent data also.
Other researchers would also benefit if data you send to one of the
Atlases has numbers and more precise dates. Precise dates are most
important for migrants.
Many thanks for all the swift data supplied so far.
Happy birding
Mike
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Michael Tarburton
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www.birding-aus.org
birding-aus.blogspot.com
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