Laurie - Very apt. Tides is right
"There is a tide in the affairs of man,
which, taken at the flood, leads onto fortune;
Omitted, all the voyage of their life
is bound in shallows and in miseries."
J Ceasar Act IV,iii
Chris Gregory
On 15 March 2011 17:46, Laurie Knight <> wrote:
> Shorely you mean "Beware the Tides of March"
>
>
> On 15/03/2011, at 3:55 PM, Chris Gregory wrote:
>
> Yup - one of those days ....."Beware the Ides of March"
>>
>> Cheers
>> Chris Gregory
>>
>> On 15 March 2011 16:17, Carl Clifford <> wrote:
>>
>> Sorry Jill, it's one of those days.
>>>
>>> Carl
>>>
>>>
>>> On 15/03/2011, at 4:11 PM, Jill Dening wrote:
>>>
>>> I knew the answer was out there somewhere :-) Why didn't I ask you
>>> before,
>>> Carl? Cancel the geolocators!
>>>
>>> Jill
>>>
>>> Jill Dening
>>> Sunshine Coast, Queensland, Australia
>>>
>>> 26° 51' 41"S 152° 56' 00"E
>>>
>>> On 15/03/2011 1:32 PM, Carl Clifford wrote:
>>>
>>> Jill,
>>>>
>>>> Perhaps the best answer to where and when they go is that they take Tern
>>>> about?
>>>>
>>>> Cheers,
>>>>
>>>> Carl Clifford, (diving for fox-hole)
>>>>
>>>>
>>>> On 15/03/2011, at 2:09 PM, Jill Dening wrote:
>>>>
>>>> Carl,
>>>>
>>>> You have asked a bigger question than you realise. In short, they are
>>>> northern hemisphere breeders and they spend the austral summer in the
>>>> southern hemisphere. Flying through the East Asian-Australasian Flyway,
>>>> they arrive around November and most are gone by sometime in April.
>>>>
>>>> The Sunshine Coast is a hotspot for migratory terns, but as you can see
>>>> from the numbers supplied, they have a peak in late summer. We don't
>>>> know the answer to the question, "where do they spend the height of the
>>>> Australian summer" because I have asked many times, and never received a
>>>> satisfactory answer. If they do spend the summer in Australia, there are
>>>> no reported concentrations, and the only possibility is that they spread
>>>> out into very small, unnoticeable groups in southern Australia. Or, it's
>>>> possible that they go to Pacific Islands (but where?). However, they
>>>> pass through the Sunshine Coast region on their way north in late summer
>>>> early autumn in larger numbers than is the stable summer population.
>>>>
>>>> Because there has been little banding of migratory terns (some Commons
>>>> flagged orange in Victoria over the years, but no individual marking) we
>>>> don't know exactly where our migratory terns breed. They breed in places
>>>> like eastern China, Japan, the Philippines, and I think Mongolia.
>>>> However, I'd love to know exactly where they go. We need satellite
>>>> trackers and in certain cases, perhaps geolocators.
>>>>
>>>> I think there are possibly numerous breeding locations and timetables
>>>> for the East Asian subspecies of Common Tern (Sterna hirundo
>>>> longipennis). I have no proof, only questions and hints which lead me to
>>>> think so.
>>>>
>>>> Nor do we know where the Australian-breeding Little Terns (Sternula
>>>> albifrons sinensis) go during the austral winter. We know they don't
>>>> join the breeders in Japan, which breed during the northern summer. We
>>>> know this because there has never been a record of an Australian breeder
>>>> in Japan amongst their Little Terns. The northmost Australian records of
>>>> this group are my own in Maroochydore, Sunshine Coast in early autumn,
>>>> and a single record by Clive Minton of a bird seen on Swain Reefs off
>>>> Qld (or was it the Cap Bunker?) in July, 2000. So we definitely need
>>>> geolocators for Australian-breeding Little Terns. I think geolocators
>>>> would be suitable because they tend to return to the same breeding
>>>> sites.
>>>>
>>>> I should explain for clarity. The subspecies of Little Tern which breeds
>>>> in Australia during our summer is the same subspecies of Little Tern
>>>> which breeds in the northern hemisphere during the northern summer. They
>>>> are different populations, and whilst the two populations mix here in
>>>> Australia, their breeding habits are out of kilter with each other.
>>>>
>>>> I haven't gone into it too far, but if anyone wants to ask more
>>>> questions, that's OK. It's rather complicated.
>>>>
>>>> Cheers,
>>>>
>>>> Jill
>>>>
>>>> Jill Dening
>>>> Sunshine Coast, Queensland, Australia
>>>>
>>>> 26° 51' 41"S 152° 56' 00"E
>>>>
>>>> On 15/03/2011 12:38 PM, Carl Weber wrote:
>>>>
>>>> Hi,
>>>>>
>>>>> Where have the terns migrated from and where are they going to?
>>>>>
>>>>> Carl Weber
>>>>>
>>>>> -----Original Message-----
>>>>> From:
>>>>> On Behalf Of Jill
>>>>> Dening
>>>>> Sent: Tuesday, 15 March 2011 8:59 AM
>>>>> To: birding-aus
>>>>> Subject: [Birding-Aus] Tern migration peak has passed on the Sunshine
>>>>> Coast,
>>>>> Qld
>>>>>
>>>>> Hi Everyone,
>>>>>
>>>>> Last night we did a count of migratory terns arriving to roost in
>>>>> Noosa,
>>>>> Qld. The vast majority of these birds are Common Terns, but also
>>>>> included are Little Terns and White-winged Black Terns. This confirmed
>>>>> that the migration peak has passed in our area. Unfortunately we only
>>>>> conduct one count each month, limiting our knowledge of the actual
>>>>> peak,
>>>>> but below are some figures going back to Nov, 05, with dates. Note that
>>>>> there was a gap in data collection between January and December 2007,
>>>>> and that we missed a count in March, 2010.
>>>>>
>>>>> Birds are normally counted on the wing in blocks of 10, so the figures
>>>>> are never exact. Occasionally at peak periods they are counted in
>>>>> blocks
>>>>> of 50s, or even 100s rarely.
>>>>>
>>>>> Cheers,
>>>>>
>>>>> Jill
>>>>>
>>>>> Survey_Date Sum Of Number_Seen
>>>>> 28-Nov-05 2380
>>>>> 14-Jan-06 12560
>>>>> 08-Feb-06 38340
>>>>> 08-Mar-06 14910
>>>>> 12-Mar-06 6020
>>>>> 15-Dec-06 573
>>>>> 15-Jan-07 2050
>>>>> 19-Dec-07 2740
>>>>> 17-Jan-08 2930
>>>>> 21-Feb-08 6650
>>>>> 15-Mar-08 1900
>>>>> 22-Apr-08 765
>>>>> 15-Dec-08 60
>>>>> 12-Jan-09 15030
>>>>> 11-Feb-09 1280
>>>>> 05-Mar-09 7400
>>>>> 09-Apr-09 5150
>>>>> 23-Jul-09 6
>>>>> 21-Aug-09 1
>>>>> 10-Dec-09 1170
>>>>> 18-Jan-10 2454
>>>>> 16-Feb-10 6330
>>>>> 15-Apr-10 3379
>>>>> 20-May-10 369
>>>>> 15-Jun-10 264
>>>>> 12-Jul-10 268
>>>>> 13-Aug-10 385
>>>>> 23-Nov-10 7280
>>>>> 07-Dec-10 11000
>>>>> 27-Jan-11 12830
>>>>> 24-Feb-11 21110
>>>>> 16-Mar-11 7170
>>>>>
>>>>> ===============================
>>>>>
>>>>
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