It Only Takes One

ALZ8035, the single Sedge Warbler we caught on 3 August 2024 at Cockerham had been ringed elsewhere. The morning was one of excruciating slowness with just 3 birds trapped. Fortunately ALZ8035 now reminds us that catching even low numbers of birds can produce interesting results. 

Birds are such creatures of habit that ALZ8035 was first ringed at Icklesham, Sussex on 1 August 2023, a juvenile of that year, and then recaptured by us almost exactly a year to the day and now an adult. 

Sedge Warbler - Icklesham and Cockerham

 

Sedge Warbler

Icklesham is a coastal migration hot spot where many species migrate from and to France in autumn and spring with April, May and then August/September the peak times when migratory birds cross the English Channel to winter further south. 

Sedge Warbler

The Sedge Warbler is a summer visitor to Britain and spends winters in Africa, south of the Sahara Desert, a long journey in both directions. We are pretty sure that ALZ8035 had not bred at our Cockerham ringing site but almost certainly travelled there from north Morecambe Bay or further afield. 

We did not catch this individual either before or after 3 August, nor would we expect to do so, such is the rapid onward migration of Sedge Warblers. 

There has been a considerable amount of work done on the feeding ecology of the Sedge Warbler Acrocephalus schoenobaenus as well as on the related Reed Warbler Acrocephalus scirpaceus. Bibby et al (1976) studied the feeding behaviour of Sedge Warblers in Dorset UK prior to migration. 

Available food in the places frequented by the birds consisted almost entirely of the reed aphid Hyalopterus pruni, also known as the mealy plum aphid, or plum-reed aphid which frequently occurred in hundreds per leaf or per flower. 

Mealy plum aphid on phragmites reed

The weight gains of birds feeding on these aphids varied greatly, both amongst individuals and between years. Many of the birds stayed for very short periods. Most left after just two days. 

Bibby & Green (1981) went on to compare the patterns of migration of Reed and Sedge Warblers, both of which migrate between Britain and Africa, to see how food supply distribution might influence migration. Most Sedge Warblers fattened in southern England or northern France, and overflew Iberia, while Reed Warblers paused and fattened in Portugal. The occurrence, duration of stay and rate of weight gain of Sedge Warblers depended on the abundance of Hyalopterus pruni whose seasonality and distribution was broadly sufficient to predict the migration pattern. 

Reed Warbler

Reed Warblers showed no similar restrictions of diet, did not respond to aphid abundance and were able to achieve a similar rate of weight gain any time in September or October in Portugal. 

Back soon folks. Take care, it's a dangerous world out there.

There's rain for a day or two but Saturday is pencilled in for being outdoors.

 

Olympics Free Zone

The forecasts didn’t agree; now there’s a surprise, not. Maybe rain, maybe dry. So we decided to give it a go and I met up with Andy at 0700, far from the crack of dawn but best we could manage. 

Earlier in the week on Wednesday, Thursday and Friday I had seen small arrivals of the usual early birds, the species that breed fairly early and now more or less finished - Pied Wagtails and Meadow Pipits, plus small parties of Linnets numbering 10-20 individuals. Goldfinches at the feeders too, where many in their gingery brown plumage lacked the outnumbered colourful adults. Around the feeding station there is water that attracts the pipits and wagtails in their ever interesting autumnal plumage variations. Even hares stop by for a piece of the action.  

Click the pics for TV size views.

Pied Wagtail

Linnet

Pied Wagtail

Pied Wagtail

Brown Hare

Pied Wagtail

Meadow Pipit

Goldfinch

Meadow Pipit

Pied Wagtail

Woodpigeon

Pied Wagtail

In the week I saw the first autumnal returning Marsh Harrier, a male arriving from the east - dipping and diving, disappearing from view and then reappearing, eyes fixed on the ground in case of a slow moving target below. 

Marsh Harrier

 

He carried on flying west giving just a couple of chances for a picture before he was gone. 

The route is one that the Marsh Harriers always take. We spot them with increasing regularity from July and into November, as they meet the sea wall and the ditches, dykes and farmland of North Fylde after their journey from north and/or east of Morecambe bay. The harriers proceed mainly west , sometimes directly south before taking an inland scenic mostly farmland route south so as to avoid flying over the conurbations of Fleetwood, Poulton le Fylde or Blackpool. 

They are not looking for Big Macs, fish & chips or discarded sarnies, just fresh meat, a variety of prey including birds like Coot or Moorhen, frogs and mammals, especially rabbits. 

Eventually the harriers will meet the coast again around the River Ribble, all the while avoiding Preston City. 

Saturday morning ringing was uneventful, cool with spits & spots of rain and just 15 birds caught - 7 Goldfinch, 5 Reed Warbler, 2 Willow Warbler and 1 Sedge Warbler. 

Reed Warbler

Sedge Warbler

Sedge Warbler

Goldfinch

Goldfinch

The end of an absorbing week. And, dare I say, the weather forecast for the week ahead and into August looks very promising with warm, windless days to spend outdoors. 

Irritable Owl Syndrome

Back soon folks. I'd rather be birding than watching the telly. 

 

Monday Morn

Monday 8 July and an early Barn Owl did not hang around and anyway I was on the way to meet with Andy at 0630 at a ringing site out Pilling Way. 

Barn Owl

 

A more than average morning ensued in the way of 29 birds caught – 26 new and 3 recaptures. The morning showed evidence of post breeding arrivals of both adults and juveniles from the site itself and with arrivals of species not seen here in 2024 until now. Yes, July is Bird Autumn UK when post breeding activity and dispersal points to the beginning of true migration quite soon. 

As can be seen in these few photographs, of the 29 birds caught almost every one displayed signs of moult, post juvenile or adult post-breeding shedding and regrowth. 

Reed Warbler 19 (16 new and 3 recaptures from this year. 

Sedge Warbler 1 

Blackcap 2 - a male and a female both in breeding condition, the male heard in song near our mist nets. Chiffchaff 2 juveniles of this year. 

Goldfinch 2 – a male and a female side by side in a mist net. 

A single adult Lesser Whitethroat was in pretty heavy moult, too scruffy a look to display here,  

Wren 2. 

Reed Warbler

Blackcap

Blackcap

Goldfinch

This was a morning of hidden arrival as opposed to visible movement of birds above our watch and ringing station, a shelf of the Picasso hatchback containing rings and ringing equipment. 

A large and partly stooping Peregrine came to our attention thanks to a bunch of ever vigilant crows. Otherwise a few croaking egrets and a handful of Swallows feeding across nearby fields.  The loss of our once numerous Swallows is a national catastrophe that no one seems able or willing to tackle. I now have maybe one or two places where there is a chance of photographing a Swallow. 

Peregrine Falcon

Swallow 2024

 

We heard news of a Sand Martin we ringed at Cockerham last August, a “3J”, the input code for a bird of the year in question. 

Ringed at the quarry site 19 July 2023, ALJ4229 was found dying on May 29 2024 at Pennyghael, Isle of Mull, Argyll and Bute. A sad end to a couple of spectacular journeys. The finder reported the martin as a "swallow" - sadly the Average Joe does not know common British birds.

Sand Martin ALJ4229

Sand Martin ALJ4229

3J Sand Martin

Gone Birding

Back Soon Everyone.

 

Another Hobby

Tuesday 16 August. The forecast looked spot on for Wednesday morning so on Tuesday afternoon I drove out to Pilling way to check everything was in place for a ringing session the following morning. I saw five Common Snipe on the mucky pools and where wagtails usually outnumber waders but not on this occasion. Perhaps the time of day was not ideal for wagtails but I was confident there would be both Meadow Pipits and wagtails the next morning. 

Snipe

Pied Wagtail

As I drove off site I spotted the slow, lazy flight of a Marsh Harrier, quartering the ground like a Barn Owl, floating above the grassy fields and reedy ditches on long, V-shaped wings, looking and listening for movement below. The harrier was heading my way, but then veered off and I lost it as it headed north west. Not to worry, there was a good chance the same or another one would be around on Wednesday morning. 

Marsh Harrier

 

On Wednesday morning I met Will at 0630 with a net or two and with the walk-in pipit trap. the one we bait with wriggly meal worms.

Meal worms

Although we caught a few Meadow Pipits, the numbers for a larger total just weren’t around and neither were the wagtails of recent days. We caught 8 birds - 4 Meadow Pipit, 2 Reed Bunting, 1 Reed Warbler,  1 Sedge Warbler. 

We rarely capture Meadow Pipits a second time because the species is extremely transitory in both spring and autumn. Therefore it was most unusual that this morning one of the pipits in the walk-in trap bore ring number ACV6545, previously caught and ringed here on 9 August. The lure of free meal worms had overcome any fear or memory that the bird may have had of the walk-in trap just a week ago. It seemed that the pipit is no hurry to migrate south. 

Reed Bunting

Reed Warbler

Meadow Pipit

Sedge Warbler

 

Our catch was a poor representation of the numbers of small birds and the species we saw, with highlights of 40 Meadow Pipit, 10 Reed Bunting, 8 Goldfinch, 30 Swallow, 15 Tree Sparrow, 3 Sedge Warbler, 15 Linnet and 8 Goldfinch. 

Better was to come when Will’s superior eyes caught sight of a Hobby heading our way. And then we watched as it changed direction upon spotting us and hurried off in the direction of Fluke Hall and Knott End some miles away.  It quickly became a speck in the hazy sky to the west.

It was not a surprise to watch a far off Marsh Harrier as it hunted out over the salt marsh but it was too distant to age or sex from some 100 yards away. Was it the same one as Tuesday? Unlikely since mid to late August is peak passage time for this now fairly common raptor of Northern England. 

We packed in early as numbers and the clear skies above did little for our catch. But we’ll be back soon so don’t go away good friends because there’s always news, views and photos on Another Bird Blog. 

Linking this weekend to Eileen's Saturday. 

Testing Times

The thunderstorm of Saturday moved north and east from here in coastal Lancashire and headed across the Pennines to disrupt the Headingley Test Match. There was less cricket to watch on TV but the Sunday forecast was unimpaired; a dry, bright morning with 2-5 mph and the prospect of a ringing session following weeks of inactivity. 

The rain was gone when I met up with Will for a brutal 0600 start but high hopes of catching a few warblers. Viewing visits in recent days saw seven or eight singing Reed Warblers and pairs of both Reed Bunting and Sedge Warbler with plenty of feeding activity around their reed bed of choice. Surely by now, early July there would be fresh juveniles aplenty? 

Our own scoreboard saw an improvement with 16 birds caught – 2 recaptures (Wren and a Reed Warbler from 2021) and 14 new birds. 6 Reed Warbler, 2 Blackbird, 3 Great Tit, 1 Blue Tit, 1 Robin and 1 Whitethroat. 

Score sheet

 

Of the seven Reed Warblers just two were juveniles, the other five adults, numbers that meant we had scratched the surface, with more juveniles yet to fledge following the very slow start to breeding during the cold weeks of May. Reed Warblers need dense and tall reeds in which to hide their nests suspended between solid reed stems, growth that was sluggish and not to anyone’s liking. 

 

Great Tit

Wren

Blue Tit

Reed Warbler

A single Whitethroat was the other representative of the warbler family with no sight or sound of hoped for Blackcaps, Willow Warblers or Chiffchaffs, never mind more exotica like Lesser Whitethroats or Garden Warblers. The singing Reed Bunting stayed out of range and we never got to see the female buried somewhere in the edge of the reeds on her precious eggs,  

Reed Bunting

Whitethroat

It looks as though we will have to wait a week or two more for post juvenile wanderings to begin in earnest. 

Bird watching in between the ringing provided scant rewards with handfuls only of Goldfinches, Linnets and Swallows plus flybys of Grey Heron and Little Egret. 

Later,  I caught up with the cricket. England beat the Aussies in the Third Test. Now it’s all to play for in the following two games, Old Trafford next and then The Oval for the decider. 

It’s a little like ringing. Playing to win and not giving up. You can’t keep a good team down.