Gt-winged Petrels - ??

Subject: Gt-winged Petrels - ??
From: (Chris Gladwin)
Date: Tue, 20 Jun 1995 09:10:00 +0000
     Well it seems that there may be more to this.  After discussions with 
     people over the last few days, in particular Tony Palliser and Dion 
     Hobcroft, I now have to admit that I don't know what I was looking at! 
      Were they in fact Providence Petrels?  Dion - who was watching them 
     at North Head is adament that they were Gt-wingeds.  However 
     Gt-wingeds are virtually unknown at this time of year in NSW.  The 
     weather was not really right to force Providence Petrels on Shore.  
     The birds that were dots in the distance looked all dark.  But the few 
     that came close by had obviously pale grey faces and really large 
     clear white patches on the underwing - pale primary shafts.  However 
     with the late afternoon sun the body colouration of these close birds 
     was an orangy brown.  So I don't think we'd have been able to see a 
     greyish body colouration if they were Providence.  In summary the wing 
     pattern of all the close in birds fitted Providence.  On pelagics I 
     have no trouble in distinquishing the two species but from land they 
     looked diferent.  So I must retract my own records and record that 
     there were large numbers of Pterodromas off Long Reef on 17th.  Any 
     other opinions out there?  Chris Gladwin

From  Fri, 23 Jun 95 09:40 SAST
Date: Fri, 23 Jun 95 09:40 SAST
From: "PLOS, AL, ANDREA, MS" <>
Subject: (Fwd) seagull question

Date:          Wed, 21 Jun 95 10:42:46 EDT
From:          "Richard Reid-Smith" <>
Subject:       seagull question

Hi - I have a sort of question/inquiry about seagulls and was thinking of 
throwing out on your Seabird-l list but it doesn't really fit in with what I 
suspect is your list mandate - so I thought I'd check with you first.

If it's OK how do I go about it? If not can you suggest an appropriate site 
to post this?

I'm a veterinary epidemiologist with a zoology background but relatively 
little ornithology knowledge.

I'm looking for solutions for a friend who has no biology background
The inquiry is regarding how best to encourage a flock of seagulls to vaccate 
the roof of his factory (in southern Ontario, Canada) which they have decided 
is an appropriate nesting spot.  

The flock is apparently "large" - I don't know the numbers; I also don't know 
the species; they have been attracted to the roof by a large number of heat 
vents; there is no associated food source; however, there is a nearby horse 
racing track which is probably their food source.
They became established there about 5 years ago but it did not become a 
problem until the numbers grew - now the combination of the weight of the 
flock and the corrosion caused by the guano is endangering the structural 
integrity of the roof.

Any ideas or even just information on flock behaviour (reaction to noise, 
extinction of fear response, nesting behaviour) would be greatly appreciated.


Richard Reid-Smith, BSc, DVM
Dept. Population Medicine
Ontario Veterinary College
U of Guelph, Guelph, ON, Canada

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