Leach's Storm-petrel, Heysham north harbour wall3 October 2009 Heysham Leach’s Storm-petrels. After several weeks in the doldrums at last I have something inspiring to write about! A howling westerly wind had continued all night, rattling the door of the cottage and blowing over the neighbour’s wheely bin, which I almost fell over in the darkness as I left for my usual Saturday morning tour of the patch. After a quick stop at the local Scottish restaurant for breakfast I was soon at
Lower Foulridge Reservoir for dawn in the hope of something blown inland or a westbound migrant grounded by the bad weather. This place continues to disappoint after promising so much earlier in the autumn and all I could muster of interest was a fairly high count of 330 Northern Lapwings.
Upper Foulridge Reservoir was even quieter with no sign of the recent shovelers. In the rain at ‘o-o-a’
Hellifield Flash, which is in great condition at the moment now the water level has dropped again exposing lots of mud, amongst a throng of ducks, a Northern Pintail and 27 Northern Shovelers were notable. Also here were: Little Grebe (two); Dunlin (four), Common Ringed Plover (two 1cy), Common Snipe (27) and Northern Lapwing (520). Whilst continuing to
Stocks Reservoir the weather worsened further and the rain became heavier. There was little of interest here either, with two Northern Pintails the highlight. A quick call to Pete Marsh confirmed that the sea at
Heysham might be productive today with a well-timed high tide just before midday combined with the overnight gale and rain. I dashed over the Knotts and down the Lune valley, arriving at the north wall just after 1100 and within about two minutes there was a
Leach’s Storm-petrel heading out of the bay, struggling into the wind quite close offshore. Pete arrived minutes later and fortunately it was still in sight. There had been another earlier in the morning plus he had just seen one from Ocean Edge, boding well for our prospects. My first Leach’s was in the hand at Boulmer in Northumberland, on the first ever petrel trapping session in the northeast and in addition to a scatter of inland birds plus a few off Norfolk, I had only experienced a Leach’s passage once before, in 1997 at the same time the Black-winged Pratincole was at Martin Mere. Even then we only saw a handful of distant birds coming out of the River Mersey from New Brighton so I have been keen to see them again since I moved here four years ago.

Leach's Storm-petrel, Heysham north harbour wall - the first of 36 for me and below the wooden jetty takes another batteringParked on the north wall the mountainous sea at high tide was pretty exciting as huge waves almost covered the wooden jetty at times and broke over the end of the wall. Pete confirmed that as high tide had actually passed we should be OK and after another squall passed through we eventually had another Leach’s Storm-petrel at 1152, again following a similar line out of the bay to the first one. The falling tide and improving visibility aided our scanning and what followed was a thrilling procession of another 35 of these enigmatic petrels as they left the bay on the falling tide, heading back to the open water of the Irish Sea. Most were single birds but occasionally two together zig-zagged their way through the wave troughs past us, some of the later birds pausing to feed, foot-pattering over the water. The wind remained strong and it was impossible to remain steady on your feet so the finer details of many of the birds were hard to discern. The sickle-shaped wings, however, and prominent pale-edged great covert patches were very obvious and sometimes the forked tail as well. A couple of features I had not noticed before were that the under wing can show a pale line down its centre and also from certain angles the tail can look quite square and the white rump can look ‘wrapped around’, which could be potentially confusing. Also the dark line on the centre of the rump was not at all easy to see on most birds. It was very educational sea watching with Guru Pete as his experience showed that it is much easier to watch from towards the end of the north wall looking down the wave troughs in a westerly as many of the petrels would be hidden otherwise. Pete had a couple after I left but otherwise the movement ended as the tide fell lower.



Leach's Storm-petrels, Heysham north harbour wallOther highlights of the sea watch were: Great Crested Grebe (one); Red-throated Diver (one); shearwater sp. (probably Manx); Common Guillemot (two); Kittiwake (two adults behind the IOM ferry);
Mediterranean Gull (three, two adults and a first winter);
Little Gull (two juveniles out); Northern Pintail (three out); Northern Eider (c.10) and it also ended on a high note with a
Bonxie into the bay at just after 1400. Further up the coast at the windblown
Leighton Moss Eric Morecambe complex two Spotted Redshank and three Black-tailed Godwits were amongst a large flock of Common Redshank and c.10 Little Egrets were scattered in the ditches beyond. I also checked Pine Lake and Alston Reservoirs on the way home in the hope of a seabird to no avail. As Dave Bickerton commented, it was probably not blowing for long enough to wreck something inland.
Mediterranean Gull, Heysham (1cy)