Chinese Pond Heron- new feature

and likely aging

Martin Garner

It’s a Chinese Pond Heron and I think its a first winter. Here’s a little feature to add to the identification and the pros and cons of aging. It’s not an adult, and we are still learning…There is also a courtesy request at the end.

Chinese  Pond Heron, Hythe, Kent, by Paul Rowe- whose images helped clarify some things.

Chinese Pond Heron, Hythe, Kent, by Paul Rowe- whose images helped clarify some things.

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Chinese Pond Heron, Bankok by Dave Gandy. Compare face and head pattern with Kent bird above

Chinese Pond Heron, Bankok by Dave Gandy. Compare face and head pattern with Kent bird above

On Identification – ‘new feature’

 

Maybe this will help. ‘New feature’ over-eggs it- but seems to have merit in the ID process. The Kent pond heron unsurprisingly at this time of year is moulting into a more definitive summer plumage. The fascinating journey with this bird is that there was time when attempting non breeding pond herons was a hiding to nothing. Studying, questioning, exploring a bird like this can teach a great deal. One feature that final dispels any lingering uncertainty in me is an aspect of the head pattern which is emerging on the Kent bird – more obviously on the right than left side. It’s clearly present- normal for Chinese Pond Heron (try searching through images of summer plumage Chinese Pond Herons and the other species- it soon becomes very obvious). You can just about squeeze some pattern of streaking occasionally present in the same area on another pond heron sp. which kinda mirrors it. However the ‘new breeding colours’ will also be emerging and are not maroon!

 

 

Paul Rowe 2

above 2 images of Chinese Pond Heron in Kent by Paul Rowe

above 2 images of Chinese Pond Heron in Kent by Paul Rowe

On aging. What can be said?

 

The Kent bird is not an adult.

You will see from previous posts we have wrestled and journey with the birds’ ID and aging. Having had longer look with fantastic input from Ian Lewington, Kester Wilson, Paul Leader, Grahame Walbridge and Paul Holt, it’s  a little more clear.

Adults have mostly/ all white wing tips and broad rounded tips to the primary feathers at this time of year. “Adults lack the dark primary shafts which are really obvious in my juveniles – and the Kent bird. The Kent is certainly not an adult (if that has been suggested). ” (Paul Leader)

 

A first winter?

The shape of the primary tips arguably favours a 1st winter bird. The heavily pigmented dark outer primaries and primary tips appears to be rather tapered and worn, the shape looks typical of 2cy, compared to the broader more rounded tips of an adult. Notice how just as in Paul Leaders photos of ‘wings in the hand’ from Mai Po, Hong Kong, the inner primaries are less tapered in shape than the outer one and less damaged at tip compared with outer ones. “Looking at the flight shots of the Kent bird the primary tips do appear to be a better match for 2cy.” (Paul Holt)

adult Chinese Pond Heron, Bankok, Dave Gandy. All white wings

adult Chinese Pond Heron, Bankok, Dave Gandy. All white wings

Adult Squacco Heron  Eilat 31 March 2012 showing colour and shape of primaires

Adult Squacco Heron Eilat 31 March 2012 showing colour and shape of primaires

first winter Chinese Pond Heron. Ian Lewington

first winter Chinese Pond Heron. Ian Lewington

 

adult Chinese Pond Heron. Ian Lewington

adult Chinese Pond Heron. Ian Lewington

 

 

adult above and first winter below Chinese Pond Heron. Ian Lewington

adult above and first winter below Chinese Pond Heron. Ian Lewington

 The Unresolved Question

Brown pattering in upperwing 

 

Brown pattering in upperwing  of the Kent is considered to be too much for any adults, but is it too little for a first winter bird?

 

Both Paul Leader and Paul Holt, expressed the view they thought the brown streaking to some degree in the uppering coverts, especially lesser coverts should be more obvious in the Kent bird, were it a first winter (2cy). Compare Paul Leader’s in hand wing shots with open wing/flight shots of the Kent bird to see what is meant. For me (MG) personally, and I  may well be proven wrong- the wing tip shape is good for  first winter, and the pigment may be at the light end- it’s not far off Paul Leaders photos taken 5 months earlier… Maybe further research will establish that the 2cy bird in Fe/March can look like this. Another valid view being explored I that it is a 2nd winter (3cy) bird. More research needed!

 

Brown fringing to tail feathers

 

Some 1st winters have brown fringing to tail feathers. The tail on the Kent bird appears to be all white. Whether all 1st winters have brown tail tips, or not or fading occurs needs more research.

 

Mai po, hk  Oct 1cy bacchus Paul LEADER

2 examples of 1st winter Chinese Pond Herons, Mai Po, HK. Oct. 2004 by Paul Leader

2 examples of 1st winter Chinese Pond Herons, Mai Po, HK. Oct. 2004 by Paul Leader

CPH14aCPH18awing labelled

Paul Rowe 3

and above all- enjoy the bird !

And in honouring the dudes- thanks to these guys who have added so much on this: Oscar Campbell, Paul Rowe, Phil Palmer, Ian Lewington, Grahame Walbridge, Paul Holt, Paul Leader, Kester Wilson, Dave Gandy, Paul Apps, Dave Allen, James Lowen, Ian Roberts, Brett Richards, David Walker, David Carr, Thomas Sacher, Martin Goodey.

One courtesy please.

 

Can I just ask for one courtesy? Some great folk, friends and colleagues contribute to Birding Frontiers (and whatever is written is free to view of course). So I do get disappointed when some kind of pot shot is made about someone as a result of a contribution made in all good faith. If you see something on here that bothers you, raises a question etc- I am very accessible– email, twitter, facebook, phone- just ask. Unfortunately, usually the truth is much less interesting than a bit of gossip J Thanks!

 

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