Cambrian Ornithological Society

COS is the county bird club for northwest Wales and produces the annual Cambrian Bird Report for the counties of Caernarfon, Anglesey and Meirionnydd. COS is affiliated to the Welsh Ornithological Society, which hosts these pages.

Indoor meetings are held at Pensychnant Conservation Centre at 7.30pm. Hot drink and biscuits provided afterwards. Donation requested: £1 (members), £2 (non-members).

The most recent Bulletin (no. 185) can be downloaded here.


Field trips start at 10 am unless otherwise stated. Non-members welcome. Bring lunch, stout footwear and waterproofs. For further information, contact Geoff Gibbs (01248 681936) or Gareth Jones (01248 601319).

Friday 5th  January 2018:  Orkney by Phil Kirk (Chorley Nats)

An illustrated talk about Phil’s trip to Orkney and some of its smaller islands: Hoy, Sanday, and Westray, in 2014. Highlights include Short-eared Owls and Hen Harriers.

 Friday 2nd February: Birds, snow and bugs: working with Siberian Jays in Northern Sweden by Katherine Bowgen (BTO)

An illustrated lecture about Katherine’s research to investigate susceptibility to predation in social populations of Siberian Jay.

 Friday 2nd March: What’s that raptor? by Keith Offord (Wild Insights)

This talk had to be postponed and is now going ahead on Friday 5th October – see below for details.

Sunday 4th March: Braint Estuary and Llyn Coron

Winter Wildfowl and Waders including Brent Geese. Leader Rhion Pritchard. Meet 10 AM, Pen-Lon Car Park, Braint; SH432643; LL61 6RS

Friday 6th April: Wild Mersey by Bill Morton (Frodsham Birder)

Bill Morton has been bird-watching over Frodsham Marsh and the Mersey since he was a teenager.

 Wednesday 11th April: Anafon Valley and Abergwyngregyn Woods

A search for Ring Ouzel before they move to their high breeding grounds. Leader Gareth Jones. Meet 9am at Village Car Park by Aber Falls Pub; SH657728; LL33 0LF

Friday 4th May: Bringing Art and Science Together Through Wood- cock Ringing by Owen Williams (Wildscapes)

Owen Williams is a highly-acclaimed artist with a passion for Woodcock. He has ringed more than 1700 Woodcock and uses proceeds from his paintings and bronze sculptures to purchase geo-locators with which to research their home ranges and migrations.

Sunday 6th May: Cemlyn and surrounding Area

This is a good time for migrants and hopefully terns. Rarities could also be a possibility at this time. Leader Tony White. Meet 9am at the car park, West side of the Lagoon; SH329936

Wednesday 6th June:  Cors Ddyga (Malltraeth Marsh)

An interesting walk round a little visited reserve. Bittern and  Marsh Harrier are always a possibility. Leader Ian Hawkins. Meet 8am, in the RSPB car park off the A5 below Pentre Berw; SH463726; LL60 6LD

Wednesday 4th July: Day Trip to Ynys Enlli from Porthmeudwy

Little needs to be said about a visit to this island. See the Bulletin for further details.

 Friday 7th September: The RSPB on the Dee: From the Mud to the Mere  by Daniel Trotman (RSPB)

The Dee Estuary and its Burton Mere Wetlands Reserve is an internationally important winter home for tens of thousands of ducks, geese and waders. Daniel Trotman, Development Officer for the RSPB Dee Estuary Reserves, will give an illustrated talk about some of its wildlife.

Wednesday 12th September

Hilbre Island, Dee Estuary

Waders will be high on our lists today. Leader John Small. Meet 9am, at Dee Lane, west Kirby; SJ210868; CH48 0QG

Friday 5th October

What’s that raptor? by Keith Offord (Wild Insights)

Raptors are some of our most exciting birds, but often some of the most challenging to identify. This talk takes a close look at the identification of raptors in real settings, where subtle differences in wing length, wing-beat, speed, stance and jizz provide the necessary identification clues.

Sunday 14th October

RSPB Burton Mere

A great place for migrants so anything is possible this time of year. Leader Jo Porteous. Meet at 9am at RSPB visitors’ car park, Puddington Lane, Burton; SJ314735; CH64 5SF

Friday 2nd November : Birding in South Africa by Gareth Jones and Rhion Pritchard. 

Please note late change from original programme.

Friday 7th December  

AGM & ‘Trinidad & Tobago’ by Jeff Williams et al (COS)

Following a quick AGM, members of the 2017 COS trip to Trinidad and Tobago will show slides and share experiences of this bird-watchers’ paradise – lots of hummingbirds and other tropical species.

Programme sponsored by CAMBRIAN PHOTOGRAPHY, ABERGELE ROAD, COLWYN BAY. Telephone 01492 532510.

Download the 2018 programme here.


New in 2017: COS has published Birds of Caernarfonshire, the first county avifauna since 1997, written by Rhion Pritchard. Click here to order yours (discount for COS and WOS members).

COS has also published Adar Meirionnydd/Birds of Meirionnydd, written by Rhion Pritchard. Click here for details.

Members receive the Cambrian Bird Report and four Bulletins (click here for the latest issue) each year. And there’s a year-round programme of indoor meetings and field trips. The annual subscription, due in January, is £12 (£14 for couples, £6 for student/junior members).


Hon. President: Dr Jeff Williams, Plas Elwy, Llanfair T.H., Abergele LL22 8YT
Tel: 01745 720307. Email

Hon. Treasurer: David Lee, Yr Hen Berllan, Gwyllt Road, Llanfairfechan LL33 0EG.
Tel: 01248 681268. Email

Hon. Secretary: Julian Thompson, Pensychnant, Sychnant Pass, Conwy LL32 8BJ.
Tel: 01492 592595. Email

Membership Secretary: Maryann Williams Plas Elwy, Llanfair T.H., Abergele, LL22 8YT.

Tel: 01745 720307 Email

Bird Report Editor: John Small, 4 Roosevelt Terrace, Llandudno Junction
Tel: 01492 592510. Email

Bulletin Editor: Geoff Gibbs, Fron Wen, Valley Road, Llanfairfechan LL33 0ET
Tel: 01248 681936.