Thursday, 24 January 2013

Session 2 - 24th January 2013

The session began with Peter giving us details of next week's fieldtrip to Pennington Flash in Leigh - meet at Whitefield Library at 1:00 or Pennington Flash at 1:30pm.

We then went on to quickly discuss the birds we had seen last week, which included two Barn Owls and some Goosander seen by Martyn and Alan mentioned five Waxwings which had turned up in Bury.

The first topic we looked at today was the identification of fairly common seabirds and to do this we were given a large handout containing 21 birds.  However, although there were 21 birds, there were only 17 species as some drawings were of both the male and female forms of each bird.

In summary, the birds were:
Next we went on look at the 'twin species' of Cormorant and Shag.  Both these species can be seen all year round, but their distribution is quite different and this can be diagnostic.  Shag are exclusively marine whereas Cormorants are found everywhere is both salt and freshwater environments.

Shag are smaller, slimmer necked and thinner billed than Cormorants and the yellow is confined to the gap.  In the breeding season (from January onwards) Shag have a crest on their forehead.  They tend to leap into the air before plunging fowatd when diving underwater, whereas Cormorants glide more gently underwater. 

So a combination of distribution, size, structure and jizz (behaviour) all helps ID these two species of bird.

Peter gave us another of Bill Teale's Birdwatch articles from the Yorkshire Post this time about a campaign to save Worlaby Carrs in Lincolnshire, which is a fantastic place to see Short-eared Owls. It seems that the farmer intends to plough up the rough pasture and plant rape seed as his Higher Level Countryside agreement with DEFRA which has caused the field to be unworked since 2000 has come to an end.

An e-petition for the Carrs to be preserved as rough pasture has been set up by local birders and so far it has attracted 1200+ signatures.  As well as the Owls the site also attracts Hen and Marsh Harriers, Peregrine Falcons, Merlins, Kestrels, Common and sometimes Rough-legged Buzzards.

If you'd like to register your protest by signing the petition, the address is here:

Save Worlaby Carrs e-petition

To finish today's session we were given a photograph of a gull to identify for homework - see you at Penny with your answers next week!

Birds in Focus - Cormorant and Shag

Superficially Cormorants and Shags are quite similar-looking birds which can be difficult to tell apart, especially from a distance or in poor light.  However, they each have characteristic features which can be used in identification.
Cormorant drying wings
Shag showing crest
The Cormorant is a large and conspicuous waterbird which has an almost primitive appearance with its long neck making it appear almost reptilian. It is often seen standing with its wings held out to dry. Regarded by some as black, sinister and greedy, cormorants are supreme fishers which can bring them into conflict with anglers and they have been persecuted in the past. The UK holds internationally important wintering numbers.
 
Cormorants are found around the UK coastline on rocky shores, coastal lagoons and estuaries, it is increasingly being seen inland at reservoirs, lakes and gravel pits. They can be seen all year round and they eat fish.

Cormorant (adult)

  • Size: bigger than mallard
  • Feather colours: brown, black, white
  • Beak colours: black/dark grey, yellow
  • Beak length: long
  • Beak thickness: long
  • Beak shape: long
  • Leg colour: black/grey, brown
  • Behaviour: part of flock, dives underwater
Cormorant (juvenile)
  • Colouring: Juvenile
  • Size: bigger than mallard
  • Feather colours: brown, white, grey
  • Beak colours: black/dark grey, yellow
  • Beak length: long
  • Beak thickness: long
  • Beak shape: long
  • Leg colour: black/grey, brown
  • Behaviour: part of flock, dives underwater
The Shag is a goose-sized dark long-necked birds similar to cormorants but smaller and generally slimmer with a characteristic steep forehead. In the breeding season adults develop a dark glossy green plumage and prominent recurved crest on the front of their head. In the UK they breed on coastal sites, mainly in the north and west, and over half their population is found at fewer than 10 sites, making them an Amber List species. Shags usually stay within 100-200km of their breeding grounds.
 
During the breeding season Shags can be seen at their large Scottish colonies on Orkney, Shetland, the Inner Hebrides and the Firth of Forth. Elsewhere they can be seen commonly around the coasts of Wales and South West England (especially Devon and Cornwall).
 
They can be seen all year round and they eat fish and occasionally crustacea and molluscs.
 
Shag (adult)
  • Size: bigger than mallard
  • Feather colours: brown, black, green
  • Beak colours: black/dark grey, yellow
  • Beak length: long
  • Beak thickness: long
  • Beak shape: long
  • Leg colour: black/grey, brown
  • Behaviour: part of flock, dives underwater
Shag (juvenile)
  • Colouring: Juvenile
  • Size: bigger than mallard
  • Feather colours: brown, black, white, green
  • Beak colours: black/dark grey, yellow
  • Beak length: long
  • Beak thickness: long
  • Beak shape: long
  • Leg colour: black/grey, brown
  • Behaviour: part of flock, dives underwater

Thursday, 17 January 2013

Session 1 - 17th January 2013

This was the first session of both the new term and the new year and so much of the first part was concerned with basic administrative tasks.  During the term we will be looking at the following topics:
  • British birds and their habitats in winter and spring
  • How to identify and where to find them
  • Birds and weather
  • Birds in history and culture
  • Identification of closely related or 'twin' species
  • Birdsong - identification of birds by their songs and calls
  • Identifying warblers
There was also a lot of chat about what people had seen during the five weeks since the last session. Alan and Martyn had seen Waxwings in Howe Bridge Crematorium in Leigh, and had taken some good photographs like this one:

Wawing eating a Rown berry at Howe Bridge Crematorium - (C) Alan Flavell

Laura had been to Whixall Moss in north Shropshire where she saw a Hen Harrier amongst many other birds. Alan had been on a trip around Moses Gate Country Park in Bolton with Bolton RSPB  and was told about a good place to see a wide variety of dragonflies at Darcy Lever Gravel Pits.  This should also attract birds.
 
Martyn had seen a Spoonbill and Great White Egret at Marshside RSPB at Southport, two Barn Owls in Horwich and a trip along the North Wales coast had been very productive with Hawfinches, Red-throated Divers, rafts of Common Scoters and Snow Buntings all being seen at various points along the coast.

Snow Bunting at Kinmel Bay, North Wales - (C) Martyn Jones


The class then chatted briefly about this week's BBC Winterwatch programme where Waxwings were shown feeding out of a young lad's hands in Fair Isle, Scotland and Snow Buntings were shown in large numbers on the east coast.

The main focus of the session was about identifying our two species of wild swans, the Whooper and Bewick's Swans, which superficially are both quite similar.  Another extract from Bill Teale's Birdwatch articles in the Yorkshire Post was handed out informing us that a regular 'herd' of 100 plus Whooper Swans returns each year to the Lower Derwent Valley reserve between York and Selby.  And this year they have been joined by up to eight Bewick's Swans, which is the largest number seen on this reserve for ten years.

Peter started the wild swan identification by 'going off on one' about how the Collins Guide (the birders' bible) calls the Bewick's Swan a Tundra Swan to cater for the book's American audience.  He didn't stop there either, also indicating that he doesn't like being referred to as 'you guys' by cinema attendants when he and his wife go to the pictures.

After he had calmed down a little, Peter went on to describe the adult Bewick's Swan as being smaller, stockier and having a shorter neck than the Whooper Swan, but when only one bird is present the size difference may not be as apparent.  Therefore it is better to look at the bill pattern and overall extent of the yellow colouration.

Bewick's Swan
On a Bewick's Swan, the yellow area doesn't come to a point, and it is less extensive finishing 'rounded off' above the nostril. So, from a distance, the bill is predominantly a black or darkish colour.
 
On a Whooper Swan, the yellow bill colouration comes down to a sharp point and because it almost exactly follows the bill outline, it almost looks like a 'bill within a bill'. Therefore, from distance, the bill look predominantly yellow in colour.

Whooper Swan at Martin Mere - (C) Alan Flavell


The Whooper Swans found in Britain are largely winter visitors from Iceland. On migration they visit estuaries and wetlands in north west England for winter roosts. The Bewick's Swans are winter visitors from Siberia and so are found mainly in eastern and southern Britain, although they can also sometimes be seen on the Wirral at Burton Marsh and in Lancashire. For more information look here.

Finally, we were given a photo of a swan to identify and this turned out to be a 1st winter Whooper Swan due to it's bill colouration and lighter colour, having lost most of its juvenile brown-coloured down.

We then went on to briefly look at the identification of wild geese (as opposed to the feral Canada and other 'farmyard' geese so common in parks and water bodies). These wild geese have traditional and separate wintering grounds, and so the location of the sighting is an important aid to identification.

Pink-footed Goose

Almost all the grey geese sightings in north west England will be of the Icelandic race of Pink-footed Goose.

These geese make landfall in September on the west coast and sometimes migrate as far as Norfolk in eastern England.


Taiga Bean Goose


The Taiga Bean Goose comes from Finland or Arctic Russia and so is found mainly in eastern England in places such as Norfolk - therefore it is not normally seen in north west England.

Pink-footed Geese have two main wintering areas: the Ribble Estuary and East Lancashire Mosses and the area around the Wash in eastern England.

Pinkfeet in flight

To distinguish them from the non-migratory and low-flying Canada Geese, the migratory 'Pinkfeet' fly much higher from west to east or east to west across the country and make a bugling wink-wink-wink call (like children in a distant playground according to Peter) rather than the loud honking calls of Canada and Greylag Geese.




After this we were given another photograph to identify and this turned out to be a rare daytime picture of a Woodcock, a nocturnal or crepuscular, woodland bird that is mainly active at dusk and dawn and which is not often seen during the day unless flushed.

Martyn recounted a visit to Risley Moss Nature Reserve when just as he was about to set off for home at dusk, twelve Woodcock flew overhead silhouetted against the night sky.



We briefly finished off by looking at scientific paper about Hen Harriers.  There are great concerns for the future of these beautiful birds as they are on the brink of becoming extinct in England where only one breeding pair was recorded in 2012, although there were more in Wales and Scotland.

Male Hen Harrier
We were given another extract from the Yorkshire Post about the Singleton Hide at the RSPB's Blacktoft Sands reserve near Goole which is a good place to see harriers and other birds of prey in winter.

The harriers gather together to roost in large numbers in the reeds and as well as six male and six ringtail Hen Harriers, more than twenty Marsh Harriers are present as well as a supporting cast of Peregrine Falcons, Merlins, Buzzards, Sparrowhawks, Kestrels and Barn Owls.



Peter finally ended the session by handing out a British Bird checklist sheet for us to keep a tick list of what we see this year.

Birds in Focus - Whooper and Bewick's Swans

The Whooper Swan is a large white swan, bigger than a Bewick's swan. It has a long thin neck, which it usually holds erect, and black legs. Its black bill has a large triangular patch of yellow on it. It is mainly a winter visitor to the UK from Iceland, although a couple of pairs nest in the north. The estuaries and wetlands it visits on migration and for winter roosts need protection. Its winter population and small breeding numbers make it an Amber List species.

Whooper Swan
They can be seen in Scotland, Northern Ireland, northern England and parts of East Anglia from October to March.  They eat aquatic plants, grass, grain and potatoes. Although about 11,000 Whooper Swans overwinter in the UK, there are only seven or less breeding pairs.

Whooper Swans in flight
Adult Bewick's Swans are white all over and young birds greyish with a pinkish bill. Compared to the similar Whooper Swan, these swans have proportionally more black and less yellow on their bill. They're also smaller than both Mute and Whooper Swans and have faster wingbeats.

Bewick's Swans
They're found mainly in eastern England, around the Severn estuary and in Lancashire. The Ouse and Nene Washes (Cambridgeshire), Martin Mere (Lancashire) and Slimbridge (Gloucestershire) are good places to see Bewick's swans.

Bewick's swans arrive in the UK in mid-October after breeding in Siberia. They spend the winter here in our comparatively warm climate, before departing in March.
Bewick's Swans in flight
In the UK, Bewick's swans feed in fields on leftover potatoes and grain. On their breeding grounds they eat aquatic plants and grass.  More tha 23,000 overwinter in the UK and there are around 7,000 breeding birds.