David asked an important question, and Mike provided an insightful answer. Great stuff. We can use this example to go from the particular to the general: Are the features we see on an image real? Are they the product of distortions by sun, wind, shadow etc? Are they due to the processing mechanisms? We ID a bird based on its location at our own peril. Carl Weber An Appreciative member of the Birding-Aus Audience. —–Original Message—– From: Birding-Aus [mailto:birding-aus-bounces@birding-aus.org] On Behalf Of David Stowe Sent: Thursday, 27 February 2014 7:54 PM To: Mike Carter Cc: birding-aus@birding-aus.org; brendon levot; David James Subject: Re: [Birding-Aus] FW: Christmas Island Unknown Heron Identification = Yellow Bittern Hi Mike, Thanks very much for that! Really appreciate these extra comments. Best regards, Dave On 27/02/2014, at 3:55 PM, “Mike Carter” <pterodroma@bigpond.com> wrote: > Hi David, It is because it is now clear that the streaks on the back are a real plumage feature whereas before I thought they may have been highlights produced by reflected sunlight combined with shadows of feathers raised by wind Alternatively, photographic artefact due to the low quality image, low pixel count – poor definition. Striated Herons are plain on the back, i.e. they lack those stripes/streaks. The diagonal dark line across the face through the eye is a diagnostic character of Yellow Bittern and shows better in this image. Misleading is that it is suitable habitat for Striated Heron but a bizarre place for a Yellow Bittern. Perhaps it had just flown in. > > Mike Carter > 30 Canadian Bay Road > Mount Eliza VIC 3930 > Tel (03) 9787 7136 > > —– Original Message —– From: “David Stowe” <davidstowe@optusnet.com.au> > To: “Mike Carter” <pterodroma@bigpond.com> > Cc: “brendon levot” <brendonlevot@live.com>; <birding-aus@birding-aus.org>; “David James” <burunglaut07@yahoo.com>; “Jeff Davies” <jeff@jeffdavies.com.au> > Sent: Thursday, February 27, 2014 2:28 PM > Subject: Re: [Birding-Aus] FW: Christmas Island Unknown Heron Identification = Yellow Bittern > > > Hi Mike, > As someone watching from the sidelines I’m finding this discussion very interesting and informative. Thanks to all! > I was wondering what it is about this second image that has swayed you? > > Best regards, > Dave Stowe > > > On 27/02/2014, at 1:53 PM, “Mike Carter” <pterodroma@bigpond.com> wrote: > >> This is a much better photo and changes my mind re its identity. Now, as Jeff was trying to persuade us, I have no doubt that it is a Yellow Bittern. >> Now Brendon, if others agree, you have to prepare two submissions to Birds Australia Rarities Committee (BARC), this and the Cinnamon Bittern. If you need help with those, see the BARC website or contact our chairman Tony Palliser, copied in above. >> >> Mike Carter >> 30 Canadian Bay Road >> Mount Eliza VIC 3930 >> Tel (03) 9787 7136 >> >> —– Original Message —– From: “brendon levot” <brendonlevot@live.com> >> To: <birding-aus@birding-aus.org> >> Sent: Thursday, February 27, 2014 1:02 PM >> Subject: [Birding-Aus] FW: Christmas Island Unknown Heron Identification >> >> From: brendonlevot@live.com >> To: nhaass@yahoo.com >> Subject: RE: Christmas Island Unknown Heron Identification >> Date: Thu, 27 Feb 2014 13:00:52 +1100 >> >> Hello everyone, >> >> First of all thankyou for the overwhelming response, secondly sorry for my lack of involvement in the thread as I have been computer less until now. >> >> I have posted another picture >> >> link here: http://www.wildsideaustralia.com.au/unknown-birdy-image-2/ >> >> sorry about the poor quality, these are the only 2 images. >> >> Some parks rangers who saw the bird who are not birders identified the bird as a juvenile Chinese Pond Heron using a field guide and based the ID on size. >> >> I hope this helps out a little. >> >> The facebook discussion was very helpful in identifying the bird as most people tended to side with Juv Striated Heron perhaps a sub spp of sorts, however I decided to post to birding aus as per request from some birders for further opinion. >> >> and also, yes interestingly a Cinnamon Bittern is currently in care being treated for dehydration and exhaustion, it is soon to be released. >> >> a link to the Cinnamon Bittern can be found here: http://www.wildsideaustralia.com.au/seldom-seen-the-cinnamon-bittern/ >> >> Thankyou all, >> >> Best, >> >> Brendon Levot. >> > _______________________________________________ Birding-Aus mailing list Birding-Aus@birding-aus.org To change settings or unsubscribe visit: http://birding-aus.org/mailman/listinfo/birding-aus_birding-aus.org _______________________________________________ Birding-Aus mailing list Birding-Aus@birding-aus.org To change settings or unsubscribe visit: http://birding-aus.org/mailman/listinfo/birding-aus_birding-aus.org
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