At 01:17 29/07/2002 +0800, I wrote:
On Wednesday there was a very strong westerly wind blowing. After the
rain cleared in the morning I went to the Cape at about 13:30 and stayed
until about 15:30. I sat down on the ground in the lee of a bush to
shelter from the wind and keep low to reduce the shake of the scope. Very
little to start with. The expected Yellow-nosed Albatross, and a Southern
Giant-Petrel hung around for a while. Then a Shy Albatross. Then three
smaller birds passing a Yellow-nosed Albatross. Couldn't be certain, but
they looked most like Soft-plumaged Petrels. Then a group of 10 birds
close together. Flying straight into the wind. Many fleeting glimpses
between the swells. Very dark above. Very white below. Flying quickly
with very few glides. But the wing length was too short for shearwaters
(e.g. Little or Hutton's) or most of the petrels that I know. I wasn't
sure what they were. I would need to do some homework with all the
reference books I brought.
About 10 minutes I got onto another flock of about 20 smaller birds. They
looked the same as the first flock. A thought began to form in my
mind. These definitely weren't Little Shearwaters. Maybe ..... Common
Diving-Petrels????? But they are very rare in WA .... I think.
A short while later I saw three larger birds fly through. These were long
winged. Hutton's Shearwaters? But they were heading west. They should
have been heading east back to NZ (although this is about a month early
anyway). And I usually see Hutton's in WA strung out in a line while
these three were just close together. More homework.
Another two possible Hutton's flew through. Then a scattering of about 15
or so birds over several minutes. These were smaller but longer
winged. Were these Little Shearwaters? I have only seen these in WA as
singles or twos. Could 15 pass through in a short period? More homework.
Then another close flock of about 30 of the smaller birds again. Yes they
were very dark above and white below. The tail looked square. The
wingspan was longer than the length of the bird, but not a lot
longer. They couldn't be prions as they were too dark. The light wasn't
always great but there were patches of sunlight. These weren't pale
grey. They were dark above. I guess the distance was 400 to 500 metres
through my 60 times zoom. I could distinguish general colours and size,
but very little of the body shape. I have only seen Common Diving-Petrels
once on a pelagic off Tasmania. They were quite close to the coast in
about a 5m swell! Very fat bodies.
Three more possible Hutton's went through and a Great Skua. The total for
the afternoon was ~40 Yellow-nosed Albatross, 2 Shy Albatross, 1 Southern
Giant-Petrel, ~60 Australasian Gannets (almost all adults), ~60 possible
Common Diving-Petrels, ~20 possible Little Shearwaters, 8 possible
Hutton's Shearwaters, 3 possible Soft-plumaged Petrels, 9 Sooty
Oystercatchers. I was very surprised not to see any all dark petrels such
as Great-winged and White-chinned which I have seen fairly commonly in
previous years in September, or others such as Cape Petrel or White-headed
Petrel which I have seen before at the cape. And no Wandering Albatross,
Blue Petrel, Grey Petrel, prions etc which I was hoping for. And no beach
washed birds anywhere that I checked during the week.
I did my homework, and things were as I thought. Very very few records of
Common Diving-Petrel in WA. But they were at roughly this time of
year. And a party of them recorded 50km south of Albany. The books
describe them as having "quail like" flight. These were flying quickly
but I wouldn't have described them as flying like quails. Also they are
supposed to fly into waves. These were going over the waves when needed,
and along the lee face of the waves on many occasions (hence I got quite a
lot of fair views of them). But these birds didn't appear to be feeding,
but simply flying west (or possibly around the cape).
Hutton's Shearwaters do start returning south in late July. Not clear
whether this refers just to the Kimberley / Pilbara. I see them in mid
August on the Perth pelagics, and sometimes off the coast. These birds
could have been feeding as they weren't just flying straight into the
westerly wind, but cutting back a few times and they weren't in a line.
Little Shearwaters do breed (in winter?) off the south coast near
Esperance and Albany. Large colonies further north in the Abrolhos
Islands. But surely you wouldn't get a loose flock strung out over 100 to
200 metres together? Very little information relevant to WA except a
mention of groups up to 6. These birds weren't flying dead straight but
they never cut back. i.e. they moved a bit side to side but always kept
flying generally in a westerly direction.
... cut ...
I went to the Museum of WA last Thursday and checked the specimens and
talked to Ron Johnstone and John Darnell. The small birds were Little
Shearwaters. Ron has a few reports of them moving in flocks on the south
coast. The larger birds were Hutton's Shearwaters. These are uncommon on
the south coast at this time of year, but a few have been recorded before.
___________________________________________________________________
Frank O'Connor Birding WA http://members.iinet.net.au/~foconnor
Phone : (08) 9386 5694 Email :
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