Owls Top And Bottom

The regular Barn Owl wasn't too obliging this morning. It spent the whole time dashing across and around several fields, hunting on the wing without taking a breather whereby I might picture it at rest. Barn Owls seem to do that at times - whizz around in an almost random and unpredictable fashion rather than a logical steady and measured search of the available ground.  And then on the very next occasion you go the same bird will spend ages just sat around, moving occasionally from pillar to post and using the “watch, wait and pounce” method. 

I've never quite worked out why the techniques are so different and how they relate to prevailing weather conditions, prey availability, the degree of urgency to find food, or the layout and the irregularity of the habitat which owls hunt. 

Barn Owl 

I had a few hours in which to check Conder Green. A surprise awaited in the form of a pair of Avocets with four brand new chicks. This was something of a shock because the family were on the marsh, running through the tidal creek, and not on the pool where everyone expects to see this year’s brood. 

Avocets 

So the Avocets have shown the resident Redshanks and Oystercatchers how to beat the system in what apart from a few pairs of terns and gulls has been a poor year for productivity. With mostly casual records rather than detailed study it’s hard to explain the poor year. The very low water levels with increased disturbance and interference from gulls, crows, ground predators and grazing sheep could be factors. 

Otherwise, counts of waders and wildfowl included another pair of Avocet at the far end of the pool,  45 Redshank, 22 Oystercatcher, 5 Common Sandpiper, 1 Greenshank, 5 Little Egret, 1 Grey Heron, 1 Little Grebe and 2 Shelduck. At least two Shelduck have been present most of the season without any visible breeding success. Today gave a zero count of Tufted Duck, another species which so far, and  now so late, failed to breed this year. 

 Avocet

The season saw successful but limited breeding courtesy of both Black-headed Gull and Common Terns on the floating pontoon with both species now feeding good sized young. The fact that these successes came via a relatively safe construction that is surrounded by water was perhaps a deciding factor. The pontoon is now only partially floating due to the drop in water level and may soon become a muddy island. 

Common Tern 

Little Egret 

Small birds arrived in the form of 20 Sand Martin, 4 Reed Bunting 2 Whitethroat, 1 Reed Warbler and 1 Chiffchaff. 

Just the other day came news of a Tawny Owl we ringed in 2011. It was caught at 0710 hours during an early morning autumn ringing session of 28 October 2011 at Rawcliffe Moss. 

Tawny Owl GR26760 from 28/10/2011

Will and I aged it as an adult and fitted ring number GR26760. The morning was quite quite productive with 29 birds caught - 10 Chaffinch, 5 Reed Bunting, 4 Redwing, 4 Lesser Redpoll, 3 Goldfinch and one each Dunnock, Great Tit and the Tawny Owl. 

On 29th June 2019, over seven and a half years later the owl was found “Sick, Wounded, Unhealthy” in the same location and taken into care by a raptor rescue team. 

The typical lifespan of a Tawny Owl is five years, but an age of over 18 years has been recorded for a wild Tawny Owl, and of over 27 years for a captive bird. 

I hope our Tawny survived its mishap and old age but so far I have not been able to check out the latest news. Stay tuned for an update.

UPDATE.

The owl had an eye infection, is now doing well and will be released in the next few days.

Linking today to Anni's Birding and Eileens's Saturday Blog.

Back To The Barn

Andy and I went back to ring the runt Barn Owl of 11 days ago - Boxing News. 

It was good to see the four Kestrels we ringed then had now fledged, flying free but still partly dependent upon the adults. The young Barn Owl was now big enough to take a “G” ring with all three siblings now looking likely to survive to adulthood. 

Barn Owl

Barn Owl

We took the opportunity to do a little woodland-edge mist netting as early July should mean catching plenty of juveniles. Juveniles are newly fledged birds that are still partly dependent upon their parents but stick around the area they were born until they are ready to explore their wider surroundings. We hoped to catch both warblers and finches so we gave it a couple of hours. 

Including the Barn Owl, we finished with 22 birds for the morning, all fresh-faced adolescents apart from an adult Blackcap - 6 Great Tit, 4 Blackcap, 3 Robin, 3 Long-tailed Tit, 3 Blue Tit, 1 Whitethroat, 1 Chaffinch, 1 Barn Owl 

 Blackcap

Robin

Whitethroat

There are lots of Woodpigeons in this locality, and even without really trying we counted 150-200. A recent report from the BTO mentions that this formerly rare garden bird is now booming and that it is seen in around 90 per cent of gardens which put out bird food. Our own garden is one of the 90% and where the Woodpigeon is an all-day resident. 

 Woodpigeon

Thanks to garden feeding the Goldfinch is mentioned in the same report, another thriving species that was formerly rare in gardens. We saw a good sized flock of 25+ Goldfinch and other small groups with a total of 50+ in a couple of hours. 

Also - 4 Tree Sparrow, 2 Whitethroat, 2 Greenfinch, 2 Willow Warbler, 1 Grey Heron 1 Chiffchaff, 1 Great-spotted Woodpecker, 30+ Swift and 20+ House Martins. 

Tree Sparrow 

Back soon. Don’t go away.

Linking today to Anni's Birding and Eileen's Saturday Blogspot.

One Each

The Sand Martin Saga continues. 

Even though our catches this year have been very poor, we don’t give up that easily. So I met Andy today for another go at the Sand Martins that live on the high cliffs of Cockerham Quarry. We thought there to be less martins today - c250 compared with our last visit of 23 June when we counted about 400 birds and caught five. 

It could be that some have left already as Sand Martins are known to use different colonies in the same season. This happens often due to the transient, almost temporary nature of many colony sites which may deteriorate through erosion and other weather factors, or even via ground predators like Badgers destroying the tunnels.  

Also, previous studies have shown that both adults and juveniles regularly visit colonies other than their own, especially during post-breeding and post-fledging. Adults may breed at different colonies in the same season. 

Our two birds today were both juveniles, so we ringed one each but we couldn't tempt any more to the nets. 

Sand Martin - juvenile 

On the way home I stopped to photograph young Swallows. 

Swallows 

Swallow 

Swallow 

 Swallow

There’s more ringing and more birds news on Friday.

Wet My Lips

Local birders are currently animated by the arrival in our area of a number of Common Quail Coturnix coturnix, late migrants from Southern Europe and Africa. 

With streaked and barred brown feathers and a prominent white eye-stripe, a Common Quail is distinctive in appearance, but their small and stocky build gives little hint to the impressive flying feats and migrations the species is capable of. These birds habitually avoid flying. If disturbed, they prefer to either run away or ‘freeze’, hoping to go unnoticed.

Common Quail - via Wiki Creative Commons

However, this changes in spectacular fashion when, using their disproportionately long and powerful wings, they take to the skies to migrate between their breeding grounds in Northern Europe and wintering grounds in the Sahel belt of sub-Saharan Africa. 

During early May we glimpsed a number of Quail in Menorca where the species is quite common, very vocal and occasionally seen quite well. More often than not it was the celebrated and highly distinctive call that drew our attention to a bird in a nearby crop.  At Tirant one day we were so close to a loudly singing bird, a foot or two away only, that we heard first the lesser known “growl” that precedes the actual "wet my lips" song.  This part of the quail’s repertoire sounds rather similar to a small dog; we likened it to the sound of a Jack Russell or Border Terrier. 

Common Quail 

The small, shy Common Quail prefers to stay hidden amongst the grasses and tall crops of farmland as it forages with its long, sharp claws for insects and seeds. Unless birdwatchers rise early when quail are much more active in the hour after dawn, they have little or no chance of actually seeing a quail but will almost certainly find themselves continually frustrated by the species’ habit of creeping unseen through the dense crop. 

Rarely if ever does a quail show itself to a human being; stand by for a familiar tale. When Common Quails do encounter humans it is often at their peril.

It seems that not all Common Quails migrate - the tendency to do so is determined genetically. Within a population, some individuals perform long migrations, some may only migrate to the southern Mediterranean, and others, referred to as sedentary birds, will not migrate at all. The proportion of quails that migrate is actually declining and there are two suggestions as to why.

Firstly, conditions in wintering grounds have become poor because of recurring droughts since the 1970s, making individuals that migrate only a short distance or not at all, more likely to survive. The second theory is that by introducing non-migratory Japanese Quail Coturnix japonica into populations to replenish game stock for shooting, the gene pool is flooded with sedentary genes.

Yet, for those that do migrate, the characteristic which makes them so impressive is also their downfall. While making the trip, their attempt to live a life free from human interaction is compromised as they are highly vulnerable to trapping and shooting. The efforts of those that take the Eastern route are all too often wasted after completing their epic flight across the Mediterranean. Having journeyed across the sea they fly low, heading for a place to rest but instead find themselves shot in huge numbers in France, Spain or Malta, or caught up in vast nets, particularly in Egypt and Libya.

Common Quail in Egypt/Libya

Common Quail - Malta

The illegal killing of Common Quail will provoke debate. With very large population numbers and an IUCN Red List rating of Least Concern, Common Quail are not considered to be at risk of being hunted to extinction. Historically, they have been an important food source to Egyptians and the consumption of their meat, though limited by quotas, is legal. (In the UK the Common Quail is not a quarry species and is additionally protected as a Schedule One species).

However, with advances in hunting methods over the last century, the odds have become increasingly stacked against quail. The placement of electronic devices under nets which play recordings of quail song lures greater numbers towards the traps. Additionally, lack of policing means that regulations on net size, spacing and time of year are ignored – including hunting during spring, which is illegal. This, along with the poor enforcement of catch restrictions, means quail trapping is now taking place on an unsustainable, commercial scale.

It’s not just the quails that get caught in the nets. The nets are indiscriminate meaning the demand for quails is putting other birds (including protected or Endangered species) in at risk. The trapped quails often entice predatory birds such as Merlin, Eurasian Sparrowhawk and Common Kestrels towards what looks like an easy meal. They then become ensnared and meet the same fate as their prey.

Yes, it’s good to hear, and even better to see a Common Quail, but the bigger picture deserves attention too.

Linking today to Stewart's World Bird Wednesday.

Bygone Times

We’re already planning the autumn Linnet ringing so with that in mind I set out to check Richard the farmer’s bird seed plot at Cockerham. Although we like to complain about the weather the year has been a good one for plant growth with a good mix of showery rain and now a spell of hot weather that should ripen the seeds.

Bird Seed Plot- Cockerham 

There was a Linnet singing from the stretch of bramble that lines the adjacent ditch. Hopefully it has found a mate. As a breeding species the Linnet is now pretty scarce around here so let’s hope this is an omen but I suspect not – more like a relic of times gone by. It’s not so many years ago that close to here were two loose breeding colonies of Linnets - one in gorse at Lane Ends 750 yards away and the other in a larger clump gorse at Braides farm half-a-mile away. Now we have none. 

Linnet 

As we have discovered through ringing here, the autumn and winter Linnets are not our own but originate much further away, some from the Northern Isles of Scotland.  They come here to bask in the relative winter warmth of the Lancashire coast.   

At the monoculture of Braides Farm I saw very little over or in the expanse of green except for a couple of distant Skylarks and a single Red-legged Partidge walking the farmer's track. 

I motored towards Conder Green and to compare notes now that early autumn is here. Already we have passed the longest day, the summer solstice.

There was evidence of early returning waders by way of 2 Greenshank, 4 Common Sandpiper, 24 Lapwing, 70+ Redshanks, and a handful of Curlews. Resident waders had changed little with 2 Avocet, 15 Oystercatcher and a single adult Little-ringed Plover. There have been a number of sighting of Little-ringed Plovers this year, sometimes one, often two, but it appears that no breeding occurred with zero young reported. 

Little Ringed Plover 

Little-ringed Plover Charadrius dubius is named via Charadrius a Latin word for a yellowish bird and dubius, Latin for “doubtful”, via Sonnerat a French naturalist, writer and explorer who in 1776 thought this bird might be a variant of the common Ringed Plover Charadrius hiaticula. We now know of course that the two birds are related but totally different species. 

Wildfowl and herons have changed little in recent weeks and continue as 6 Tufted Duck, 4 Shelduck, 1 Teal, 3 Little Egret and 1 Grey Heron. There’s little change on the crowded nesting platform with what looks like two chicks each for both Common Tern and Black-headed Gull.  

Common Tern

It appears that any breeding success of both Oystercatcher and Redshank here has been poor; my own sightings consisted of a single young Oystercatcher some weeks ago. Small birds and “others” were limited to 12 Pied Wagtail, 3 Reed Bunting, 3 Whitethroat, 2 Sedge Warbler, 1 Blackcap and 2 Stock Dove. 

Swallows continue to be scarce other than an unexpected posse of 35 or more at Gardner’s Farm along Moss House Lane. First broods are on the wing now so let’s hope the fine weather continues and allows the Swallows another go. A feeding party of 30 Swifts over the hedgerows was rather fine to witness. 

Swallow 

 On the way home I chanced upon a single Corn Bunting, another rarity relic of times gone by.

 Corn Bunting

Back soon. Don't go away and have a super weekend.

Linking today to Eileen's Blogspot.

Boxing News

A few weeks ago I mentioned how Andy’s contacts had invited him along to see progress in two nest boxes installed at their home. At that time a pair of Kestrels occupied a box located on a building and a pair of Barn Owls occupied a box not too far away in an open fronted barn. By using a nest box camera it was possible to see that the Kestrels had laid 5 eggs and the owls had 8 eggs. 

Barn Owl

Armed with our Barn Owl Schedule One Licence and ringing gear we went along on Monday in the hope of catching the youngsters at an appropriate age to fit their rings. Our general ringing licence covers the ringing of Kestrels but extra protection afforded to Barn Owls requires stricter rules.

Andy went up to the Barn Owl box and brought down 3 chicks. One small one proved too tiny for a “G” ring while the other two were about right, each with well-developed legs and feet. 

Barn Owl Box

Barn Owl - too small for a ring 

Barn Owl

Barn Owls begin incubation as soon as the first egg is laid and lay additional eggs over a period of around 8-21 days. After 31-32 days' incubation the eggs hatch every 2-3 days, usually in the order they were laid. This is termed “asynchronous” hatching. The age difference between the oldest and youngest nestling can be as much as three weeks. This age variation reduces the peak in food demand and spreads it over a longer period. The female does all the incubation and the male provides all the food until the young are around 3 weeks old. 

Research shows that Barn Owls regularly let their nest mates know whether they plan to compete for an incoming meal or not. The delivery of usually a rodent of some sort is fed only to a single offspring at a time, chicks queue up based on their hunger level. This approach prevents arguments (in the form of beak stabbing and stealing) from breaking out when the food arrives, thus ensuring the maximum survival of the brood. 

It will be several more weeks before our two young owls are old enough to leave the box and fend for themselves. Meanwhile the camera should let us know how they all develop, including the runt. 

Meanwhile, four juvenile Kestrels were of an ideal size and age to take an “E” ring. From their size we estimated they should fledge in about a week or ten days. 

Kestrel  

Kestrel 

We also took advantage of a brood of five Barn Swallows that were at the ideal age for ringing. 

Swallow 

Swallow nest

All in all, a successful and productive few hours.

There's more news, views and photographs soon by logging in to Another Bird Blog.

Linking today with Anni's Birding and World Bird Wednesday.

Outsmarted

There was 30 minutes to spare before the meet with Andy at the Sand Martin colony so I stopped off at a place I know. 

Barn Owl

 Barn Owl

Barn Owl

Regular readers will be familiar with our Sand Martin dilemma. “How do we catch martins when the tightly packed colony of 400+ birds is some 40ft up a sheer face of slippery sand and gravel?” Well the answer is - “we don’t”. 

In the morning shade we set a couple of mist nets on the floor of the quarry but the martins had little difficulty in outsmarting our tactics. The paltry five we caught consisted of four adults and one juvenile, so for the time of year, not a truly a representative age sample of the 400+ present when lots of youngsters should be around. 

Sand Martins have superior eyesight, supreme manoeuvrability and great flying skills; how else would they catch insects on the wing and as a side skill, be able to avoid a mist net? So it’s back to the drawing board and Plan B for our next visit. 

Sand Martin 

 Sand Martin colony

Sand Martin colony

A local Kestrel hung around at the top of the quarry most of the morning, waiting on a fence post or hiding against the grass tussocks. It is more than likely a regular visitor looking for an opportunity to snatch an inexperienced youngster or pounce upon fledglings that leave the nest tunnels prematurely. It’s an easy meal that takes little effort.  We watched a Carrion Crow stick its head into a nest tunnel until a gang of martins chased it away. 

But when a small raptor dashed through the quarry and dropped into our net, it wasn't the anticipated Kestrel but a young male Sparrowhawk, also on the lookout for a quick snack. A colony of several hundred Sand Martins will always attract predators, mammalian or airborne. 

Sparrowhawk 

Sparrowhawk

In Sparrowhawks  the iris colour changes with age. Brownish-black at hatching, the iris becomes pale lemon yellow within a couple of months.  As the birds age, the iris goes from yellow to orange and, in some adult males, wine red.

Sparrowhawk 

 Sparrowhawk

Back soon with more news and views.