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. 186) 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 4th  January:  Champions of the Flyway by Robin Sandham (COS)

Robin was in  one of 32 teams from 14 nations which took part in this internationally renowned sponsored bird race in Israel, raising money to stop the illegal trapping and hunting of migratory birds in the Mediterranean.

 Friday 1st February: Cors Ddyga RSPB Reserve by Ian Hawkins (RSPB)

Cors Ddyga, or Maltraeth Marsh, has been managed by the RSPB since 1994 and is now home to Bitterns and Marsh Harriers. Ian Hawkins, the Reserve Warden, will discuss the habitat and wildlife there.

 Friday 1st March: Birding in Arizona by Jeff Williams (COS)

Howdy pardner! Why don’t y’all mosey along to hear about Tombstone, Wyatt Earp and the Gunfight at the OK Corral? But it’s mostly about seeing birds in Arizona!

Saturday 23rd March: Field Trip to Pwllheli Harbour 

Herons and waders are on our lists today on a falling tide. Leader: Geoff Gibbs. Meet at 11.00 am at the War Memorial, Pwllheli Harbour SH375348.

Friday 5th April: Autumn Bird Migration in Estona by Barrie Cooper (Travelling Naturalist)

Estonia is a natural flyway for migrating arctic water birds. Over 50 million birds are estimated to pass the Estonian coast every year. Barrie Cooper, tour guide, will show us one of Europe’s greatest wildlife spectacles.

 Wednesday 10th April: Field trip to Anafon Valley and Abergwyngregyn Woods

Following a very successful and enjoyable trip in 2018 we are repeating our search for Ring Ouzel before they move to their high breeding grounds. Leader Jo Porteous. Meet at 9.00am at Village Car Park by Aber Falls Pub; SH657728; LL33 0LF

Sunday 28th April: Field trip to Trawsfynydd area

There should be a good mix of birds today and hopefully the woodland summer visitors will have arrived. Leader Rhion Pritchard. Meet at 9.00am at the Car Park near the Power Station; SH697384

Friday 3rd  May: Discovering Donana by Paul Kenyon

Donana National Park in Andalucia is one of the most important wetlands in Spain. Paul Kenyon has visited it many times and will give an illustrated talk on the wildlife there.

Sunday 19th May: Field trip to Cemlyn and surrounding area

This is a good time for migrants and hopefully the terns will have returned. 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 12th June:  Field trip to Woolstone Eyes Nature Reserve

This is the place for breeding Black-necked Grebe which will be in their fantastic summer plumage. Willow Tit may also be a possibility. Leader Gareth Jones. Meet at 9.00am, at the barrier on Thelwall Lane, Warrington WA14 1PD, SJ649878. Permit £2 payable on the day. NUmbers will be restricted so early booking recommended – to book phone Gareth Jones on 01248 601319 or email him at

Friday 6th September: Challenging times for bird conservation in Ireland  by Niall Hatch (BirdWatch Ireland)

BirdWatch Ireland is the largest independent conservation organisation in Eire. Niall Hatch, Development Officer, will discuss some of the challenges they face.

Saturday 21st September: Field Trip to Porthmadog area

We’ll look for waders and grebes as we stroll along the coast, then maybe move further toards Criccieth. Leaders Andy Clarke & Geoff Gibbs. Meet 10.00am, at Borth-y-Gest, Morfa Bychan Car Park; SH 565376.

Friday 4th October

A Fish with Feathers by Michael Leach (Wildlife Photographer)

Michael Leach is well known to COS memb discusses the life and adaptations of the world’s Penguins.

Tuesday 29th October

Field Trip to Heswall area and RSPB Burton Mere

The Dee estuary is always promising on a high tide with a good chance of harriers and owls. Burton has always got something of interest at this time of year. Leader David Lee. Meet at 8.30am at Broad Lane, Lower Heswall where it meets Target Road; SH253819.

Friday 1st November : Farming and wildlife by Nick Watts (Vine House Farm Bird Food).

Nicholas Watts was awarded an MBE in 2006 for services to farming and wildlife. Vine House Farm is a leading supplier of bird food and supporter of the Wildlife Trusts.

A Sunday in November (date to be arranged)

Field Trip to Martin Mere Birdwatching Festival (coach trip).

Waders and wildfowl in abundance, including Whooper Swans as well as the Festival itself – then the Starlings come in to roost! Further information when available will be in the Bulletin, linked from this page.

Friday 6th December  

AGM & ‘TBird Conservation Stories in 2019 from the Wildlife Trust’ by Chris Wynne (NWWT)

Following a quick AGM, Chris Wynne, Senior Reserves Manager, will update us on recent news from the North Wales Wildlife Trust..

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

You can download the 2019 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. Email