Mistle Thrush on the Mistletoe

For years our ailing rowan tree had a clump of male mistletoe, the neighbour’s much healthier tree was host to a berry-laden female that attracted a Mistle Thrush. The bird has a cackling call unlike the melodious and repeating sound made by the Song Thrush.*

Mistle Thrush in the mistletoe
Mistle Thrush in the mistletoe

Then, a couple of years ago, we sprouted a berry-laden female of our own and now the Mistle Thrush jealously guards its crop from other birds that might snaffle its berries.

The scientific name for this bird is Turdus viscivorus. Turdus is Latin for thrush, viscum is Latin for sticky. European Mistletoe Viscum album, album meaning white (for the colour of the berries).

Now, mistletoe is a hemi-parasite that relies on its berries being eaten by birds like the Mistle Thrush to complete its reproductive cycle. The bird’s digestive tract does not process the whole berry and it will excrete a dollop of partially digested berry with an intact seed within. The sticky mass requires a wipe and how better than to do that against the bark of a tree. Once detached from the avian cloaca, the dollop of berry with seed will germinate and embed into the host tree. It will tap into the tree’s nutrient and water supply, but as you can see mistletoe is not wholly parasitic, this evergreen species is replete with chlorophyll in its leaves and can carry out photosynthesis to make sugars from water and atmospheric carbon dioxide. Some of the sugars it makes will most likely help sustain its tree host.

Incidentally, mistletoe berries are not actually berries, they’re drupes. A berry is defined botanically as a fleshy fruit produced from a single plant ovary, with seeds embedded in the flesh. Examples include tomatoes and blueberries. A drupe, by contrast, is a fruit with an outer fleshy part and a hard, stony pit that encloses the seed examples of drupes are cherries, peaches, olives, and mistletoe berries. It’s worth noting that they are potentially fatally toxic, so if you do hang some mistletoe at Christmas, be cautious if you have pets and children around. American Mistletoe is a different species and less toxic but ingestion is still capable of giving you a serious stomach upset.

The presence of mistletoe on trees is a good sign of low atmospheric pollution in the neighbourhood.

*I strongly suspect that the bird in the song A Nightingale Sang in Berkeley Square (lyrics Eric Maschwitz, music Manning Sherwin, 1939) was actually a Song Thrush, rather than the less common summer visitor, the Nightingale, which would likely not have frequented the urban environment of Mayfair even before World War II. The song was actually written in Le Lavandou, a fishing village in France, where Nightingales were probably heard far more often than in the posh bits of London.

Natural Highlights for 2024

In recent years, I’ve pulled together an end of year diary entry to remind me and Mrs Sciencebase of the various natural sightings we’ve had during the year. I normally post it on New Year’s Eve, but am bringing it forward this year so that it sits as the most recent blog post as we approach Christmas. It’s just notes rather than a proper article, simply une aide mémoire.

So, strangely, we spent some of New Year’s Day 2024 hanging around the railway station in Great Shelford rather than trekking the north Norfolk coast. We were there to watch the irruption of Waxwings feeding on mistletoe berries. They stayed high, but would occasionally swoop in to take the presumably much more palatable rowan berries from the shorter trees. I think we’d peaked at 34 birds at the end of December here. Too many twitchers and toggers around, the birds were showing, but nervous.

Fewer Red Kites at the landfill this winter, but still got some nice closeups in early January. Also, several thousand starlings murmurating during the day there, and active hares on the neighbouring farmland.

Great views of the Holkham (Norfolk) Shore Larks this year when we finally got to North Norfolk for a visit. Distant dogwalkers flushed the birds from their feeding patch and sent the birds in our direction. They settled about 50 metres away. Also saw Ruff and Pink-footed Geese on that trip. We stayed at Briarfields hotel next to RSPB Titchwell. Red Kites over the fields behind during breakfast.

A White Stork turned up on farmland in Cottenham having spent more time a little further out, mid-February.

Once again, we are with spawn by 22nd February in the garden pond. Tadpoles a few weeks later.

Watched enormous Starling murmurations at RSPB Ouse Fen (Earith). First visit, perhaps half a million birds murmurating at between half a mile and a mile away. Four Short-eared Owls beforehand. Also, a pair of Cranes in to roost just before the Starlings went to bed. Next visit, just a couple of hundred thousand, but they were very close and overhead at various times. The Starlings settled to roost in the reedbeds close to the car park. Next visit with Mrs Sciencebase, Short-eared Owls again and Chinese Water Deer. Visit after that very few Starlings, a thousand or so, but several Bittern calling a sight of one on a hop from spot to spot in the reeds.

Three Russian White-fronted Geese at RSPB Berry Fen hanging out with some Greylags. Nice close views, early March.

Big flock of Black-tailed Godwit in the distance not far from Swavesey Lake, also Pintail there and Great White Egret (as ever), mid-March. There were also at least 13 Cattle Egrets in one of the fen drains not far from the guided busway dropoff.

17th March, spotted a male Orange Tip butterfly. First of the year for me and first recorded nationally in 2024. It was a week earlier than Orange tip in our region according to first appearance records going back to 2007.

20th March – my first Small Tortoiseshell of the year on a walk near Swavesey Lake with Andy H. Also 34 Cattle Egrets. Largest flock of that species I’ve seen.

17th April – Spotted a Sandwich Tern fishing at Brownshill Staunch. I alerted the Over Birders’ WhatsApp group, all very excited, it ended up at Ferry Lagoon, Fen Drayton. Stayed for several days.

24th May – Failed miserably to see the Red-footed Falcon at RSPB Fen Drayton, but there were numerous Hobby. Did see the Great Reed Warbler at RSPB Ouse Fen (Earith).

June – Butterflying and birding trip to Greece

July – Pair of Black-winged Stilt on Smithy Fen.

August – Lovely week in Blakeney on the north Norfolk coast, seals, birds (Spoonbills, Sandwich Terns, Wood Sandpiper, Green Sandpiper etc, moths

Early September – moth numbers up, Convolvulus Hawk-moth again, but also some lovely new species including Palpita vitrealis and Clouded Magpie. Also female Tawny Owls calling from somewhere on Pelham Way rather than the gardens behind us.

15 September – Osprey (juvenile female and briefly an adult) at Milton Country Park. Apparently, still present as of 7 October.

September – Red and Fallow Deer at Bradgate Park, en route to Tidza.

October – We didn’t try to see the Lisbon/Tegus flamingos in the end. We did tick a few bird species in Belém and in the Lisbon Botanic Gardens etc including Crested Myna, Black Redstart, Blue-crowned and Rose-ringed Parakeets, Short-toed Treecreeper etc. Meanwhile, Yellow-browed Warblers in Milton while we were in Lisbon.

October – 15th. Tallying moths, 40 per session compared with 80+ in 2019. 334 species though, so diversity roughly the same year on year.

October – 17th. Bittern, Great White Egrets, beardies, and then…juvenile Purple Heron at RSPB Earith.

October – 20th and 21st – last chance in 2024 for Snettisham Wader Spectaculars…will we get there?

November – 10th. My first Black-spotted Chestnut, outside the trap. Nice species, a little like an SHC but with the markings “broken” up.

November – 13th. Starling Murmurations (several thousand birds) and one Short-eared Owl so far at Ouse Fen, Earith

November – 15th. Definitely not a natural highlight, but we said goodbye to my Dad today and gave him a tremendous send-off.

December – I dipped out on the Penduline Tit that was spotted at RSPB Ouse Fen, Earith.

We may end up in North Norfolk at some point and we’re hoping for some more natural highlights to add to this post before the end of the year.

Bearded Reedling redux

The Bearded Reedling used to be known as the Bearded Tit. The name change wasn’t down to some odd political stance. After all, the Great Tit, Blue Tit, Long-tailed Tit, and even the Penduline Tit are all still tits.

Beardie taking flight
Beardie taking flight

No, the rationale for the rename is that the Beardie is not a tit all. It may have some of the charactertistics of the Long-tailed Tit, well, basically a long tail, but those are purely superficial similarities. The Beardie doesn’t fit into the tit family.

Female and male Bearded Reedling
Female and male Bearded Reedling

The Beardie is not in any genus in which the proper tits sit. In fact, the Bearded Reedling, Panurus biarmicus, (sometimes known as the Bearded Parrotbill) is the only known extant species within the Panurus genus. There are likely to have been others in the past, but those are extinct, not extant.

Male Bearded Reedling
Male Bearded Reedling

The British Trust for Ornithology, BTO, says 695 breeding pairs in UK. RSPB website says 630, although it said that back in 2018 when I wrote about the species back then. I don’t think their data are updated often enough, estimates on counts have presumably changed in that time.

Photographing birds from the comfort of the settee

Busy day, no chance to get out birding or togging, even. Moreover, it was dull and grey, so not great for capturing avian beauty. That said, I was setting up the new lens on my Canon R7 adjusting the customised settings buttons, a Canon RF 100-500mm F4.5-7.1L IS USM. Once I’d done that I snapped a cheeky Robin that landed on the bushes in the front garden after it was chased in by a male Blackbird. It sat on its usual perch and the Blackbird didn’t bother it again.

Anyway, photographed in low light from the comfort of the settee through the double glazing, the bird largely in shadow. Camera settings: shutter speed: 1/500s, aperture: f/7.1, ISO 4000, lens pulled to full extent 500mm.

Denoising with DxO PureRaw 4. Original and the left, denoised on the right
Denoising with DxO PureRaw 4. Original and the left, denoised on the right of the split image

I processed the image with DxO PureRaw4 as I generally do, see above. The reason I mention it so often is that it does an incredible job denoising job. I reckon it effectively pulls your image down 3-4 stops of ISO; my ISO 4000 is thus being cleaned to the noise levels one might expect at much better ISO of between 250 and 500. There’s no way I’d get a properly exposed shot with these light levels and that shutters peed at such a low ISO.

 

I then did a quick levels edit and crop in PSP to show a fellow togger:

Quick PSP edit of the DNG output from DxO
Quick PSP edit of the DNG output from DxO

Finally, I did a more detailed edit of the kind I would do before uploading to my socials:

Through-windows Robin processed in DxO PureRaw and then PaintshopPro
Through-windows Robin processed in DxO PureRaw and then PaintshopPro

Planet Earith: Great White Egret, Ardea alba

Another heron at RSPB Ouse Fen (Earith). There were 4 or 5 flying around. This is the Great White Egret, Ardea alba. It’s about the size of a Grey Heron, but white.

Great White Egret in flight against a leafy fenland backdrop
Great White Egret in flight against a leafy fenland backdrop

Quite a rarity in the UK, until maybe about 10 years ago, but like Little Egret, Cattle Egret, Glossy Ibis, and various other herons, it’s becoming an almost everyday sight in these here parts. I’ve seen perhaps 6 or 7 on the same patch at a different reserve, where there were also dozens of Little Egret and numerous Grey Heron. The GWE is not quite as common as the Little Egret now, but was removed from the “mega” list quite some time ago. It is far more common than the Purple Heron I mentioned recently.

Great White Egret is ostensibly an African/Mediterranean bird like those others. However, the species has been extending its range into Europe and the UK in recent years. Nudged by climate change, perhaps the main driving force is the presence of lots of crayfish in lakes in northern France that have given it a food source and the potential to hop across the channel. Once here, they find the old East Anglian gravel pits that are now full of water and marked as nature reserves a perfect home from home, it seems. Fairly common on the Somerset Levels these days too.

Local Purple Heron, Ardea purpurea

Back in June, we enjoyed seeing a lot of birds, butterflies, and moths in Greece. Many, if not most, of those were species rarely, if ever, seen in the UK. One bird we had a shout out from our skipper on Lake Kerkini was the Purple Heron, Ardea purpurea. I must confess I wasn’t quick enough to get a photo on the boat trip and not entirely sure I actually saw it among the Squacco and Night Herons that were in the reed as we rippled past.

Purple Heron in flight
Juvenile Purple Heron in flight, wings down

Anyway, I was out looking for Bearded Reedlings at RSPB Ouse Fen (Earith), there were lots. A Bittern came up from the reeds briefly and ducked back down, as they do. There were also four Great White Egrets flying about. But, it was the odd-looking heron in the distance that was the most intriguing…it definitely wasn’t another Bittern, but didn’t look quite right for a Grey Heron.

When I got back to base camp, I checked the photos. It was obvious on zooming in on the photo Purple Heron, Ardea purpurea. Juvenile. The species is smaller and more slender than the Grey Heron, markings are different, and overall it has darker plumage. The species is more commonly found in Africa, central and southern Europe. However, juveniles do occasionally spread their wings from the near Continent between August and October and end up in East Anglia and beyond. Sighting now with the County Bird Recorder, Jon Heath.

Purple Heron in flight
Purple Heron in flight, wings up

Mrs Sciencebase remembered there had been reports of that species earlier in the year locally. I checked on Birdguides and she was right, there had been one here back in the summer of 2023 and a scattering of others over the last few years. Indeed, earliest Birdguides record I can see on the app is summer 2003 at Needingworth (which is now part of RSPB Ouse Fen).

Looking at the national sightings on the app, I can see sightings of Purple Heron in Somerset, Shropshire, Norfolk, Devon, Suffolk, Jersey during September and October.

This is one of my natural highlights of 2024. I will give you a full update of those on New Year’s Eve!

Of parakeets and parks

There are several species of parakeet present in European cities alongside the Rose-ringed, or Ring-necked, Parakeet, Psittacula krameri, also known as the Kramer Parrot. The others are Blue-crowned Parakeet, Thectocercus acuticaudatus, the Alexandrine Parakeet, P. eupatria, and the Monk Parakeet, Myiopsitta monachus. If we’re talking parrots in general, there’s also the Common Parakeet, perhaps better known as the Budgerigar, Melopsittacus undulatus.

Rose-ringed Parakeet
Rose-ringed Parakeet

The Rose-ringed Parakeet is well known in city parks and green spaces with trees across Europe from Athens to Amsterdam, Barcelona to Bonn, and Lisbon to London, and even as far north as Newcastle. The common sub-species in those cities is native to Africa but has adapted successfully to living in disturbed and urban habitats having escaped deforestation. Their presence in London has nothing to do with an imagined publicity stunt by Jimi Hendrix.

Rose-ringed Parakeets were and presumably still are a popular pet bird species and so escapees have fed into the feral populations. It is naturalised in many places now, breeding as if native. But, it is considered a pest in places where the sub-species in India has bred into massive colonies, but in Europe there does not seem to be a need to cull them. Peregrines, Hobbies, and Tawny Owls will all predate Rose-ringed.

Blue-crowned Conures, or Parakeets
Blue-crowned Parakeets, Lisbon Botanical Gardens

Meanwhile, the Blue-crowned Parakeet is a native of South America. It is generally found from eastern Colombia to Curaçao in the southern Caribbean to the northern parts of Argentina. It prefers savanna-like habitats, woodland, and forest margins and so is generally not present in dense, humid forest like the Amazon. Introduced, as one might expect, to the USA, specifically south Florida, California, and Hawaii. It is now present in several cities across Europe too, Barcelona, Lisbon, Milan, Paris, Zürich, and on the Canary Islands.

Blue-crowned Parakeet
Blue-crowned Parakeet

A Blue-crowned Parakeet nest with eggs, subsequently predated, was observed in 2001 in Lewisham, southeast London.

Incidental birding in Lisbon

We spent a few days in Lisbon in early October, our first time in the beautiful and cosmopolitan capital of Portugal. Man, it was nominally a city break to celebrate our 32nd wedding anniversary, which was earlier in the year. There had been the notion of perhaps heading up to the Tagus Estuary Nature Reserve to see the flamingos, but we didn’t get there in the end. We kept our eyes peeled for birds in between more conventional city sightseeing in the city, as well as Belém (west along the river) and Oriente (to the east, as the name would suggest).

Rose-ringed Parakeet, one of many at the Portuguese Naval Museum in Belém
Rose-ringed Parakeet, one of many around the Portuguese Naval Museum in Belém
Black Redstart outside the Portuguese Naval Museum, Belém
Black Redstart outside the Portuguese Naval Museum, Belém

We didn’t spot any Black Kites, Azure-winged Magpies, nor Hoopoe, which I’d hoped for, but there were lots of Crested Myna, Black Redstart, and Rose-ringed Parakeets at the Mosteiro de Jeronimos in Belém. A couple of hours at the Parque Eduardo VII added Sardinian Warbler, Short-toed Treecreeper, and Serin to the list. Then another couple of hours in the Botanic Gardens added two species of parakeet Blue-crowned and Rose-ringed.

Three Blue-crowned Parakeets
These three Blue-crowned Parakeets seem to be sharing a joke…probably at the photographer’s expense

It was wonderful to spend some time in the peace of the Lisbon Botanical Gardens away from the bustle of the streets and the trams. It was also warm and sunny while we were there and with the sight and sound of Willow Warbler and Blackcap around it was almost like a summer rewind. The deciduous trees were starting to show signs of the autumn, of course, but it was still 25 Celsius and very humid, twice the temperature it had been at home when we left Old Blighty.

Willow Warbler in the Botanical Gardens
Willow Warbler in the Lisbon Botanical Gardens
Perched, it looks like a shabby Blackbird with a white bill, but this is actually a Crested Myna, an introduced Asian species now present in Lisbon and environs
Perched, it looks like a shabby Blackbird with a white bill, but this is actually a Crested Myna, also known as the Chinese Starling, Acridotheres cristatellus, an introduced Asian species now present in Lisbon and environs. Obvious white patches on the wings in flight are a giveaway.
Chinese Starling or Crested Myna
Slightly more obvious in this photo: Crested Myna
A couple more of the Rose-ringed Parakeet
A couple more of the Rose-ringed Parakeet
Blue-crowned Parakeet in flight, Lisbon Botanical Gardens
Blue-crowned Parakeet in flight, Lisbon Botanical Gardens
Male Rose-ringed Parakeet
Male Rose-ringed Parakeet
Eurasian Jay
Eurasian Jay

We finally caught up with a load of European Serin, Serinus serinus, in the Edward VII park in Lisbon. Not seen this bird species before, it’s related to the Ethiopian Siskin and the Black-headed Canary, but you could also say it’s a distant cousin of the European Goldfinch and the European Siskin, to which is bears more than a passing resemblance. They’re all finches, basically.

European Serin
European Serin
Yellow-legged Gulls, quayside, Lisbon
Yellow-legged Gulls, Larus michahellis, quayside, Lisbon

The hopefully complete bird list for our four-day ostensibly non-birding trip. Birds without a place were seen in various places or just around Lisbon/riverside in general. Birds marked * are lifers for us.

  1. Black-Headed Gull
  2. Black-tailed Godwit – Oriente
  3. Blue-Crowned Parakeet* – Botanic Gardens
  4. Common Black Redstart – Parque Edward VII
  5. Common Blackbird
  6. Common Buzzard
  7. Common Chaffinch
  8. Common Chiffchaff – Parque Edward VII
  9. Common Sandpiper – Oriente
  10. Crested Myna* – Naval Museum, Belém
  11. Eurasian Crag Martin* – Miradouro de Santa Catarina
  12. European Herring Gull
  13. European Pied Flycatcher – Heard only, Botanic
  14. European Robin
  15. European Serin* – Parque Edward VII
  16. European Starling
  17. Eurasian Blackcap – Parque Edward VII, Botanic
  18. Eurasian Blue Tit
  19. Eurasian Jay – Parque Edward VII
  20. Eurasian Oystercatcher – River
  21. Eurasian Wren
  22. Feral Pigeon
  23. Great Black-backed Gull
  24. Great Cormorant – River
  25. Great Tit
  26. Grey Heron – Naval Museum, Belém
  27. House Sparrow
  28. Lesser Black-backed Gull
  29. Long-Tailed Tit
  30. Rose-Ringed Parakeet – Naval Museum, Botanic etc
  31. Ruddy Turnstone – Riverside to Belém
  32. Sardinian Warbler – Parque Edward VII
  33. Short-Toed Treecreeper* – Parque Edward VII, Botanic
  34. Spotted Flycatcher – Parque Edward VII
  35. Spotless Starling* – Parque Edward VII
  36. Western Jackdaw
  37. White Wagtail – Belém
  38. Willow Warbler – Parque Edward VII
  39. Yellow-Legged Gull

Just to add, we saw a few Large White butterflies, presumed Speckled Wood, and a few Lang’s Short-tailed Blue, and also Velvet Carpenter Bee, and some fish in the river, but, that was pretty much it on other wildlife, as you’d expect from a city break.

Birds photographed with a Canon R7 mirrorless digital camera fitted with an appropriate adapter and an ancient Canon EF L 70-300mm f/4-5.6 IS lens.

Osprey with prey

Another view of the juvenile Osprey that has been feeding and resting at Milton Country Park since 5th September 2024. It is an unringed bird, so not a fledgling from the breeders at Rutland Water. It is, rather, most likely to have flown in from Scotland or Cumbria, a wild fledgling, heading to Gambia or a neighbouring country for the winter.

Juvenile Osprey with piscine prey
Juvenile Osprey with piscine prey (large bream, Abramis brama)

Usually, the adult birds tend to fly from their nesting sites right through to Africa without needing to stop over at country parks and the like. But, inexperienced juveniles, like all children, get hungry on a long journey and so this juvenile has stopped off to refuel. One person in the park reported that the juvenile had settled on their garden fence in the village briefly.

Having said that about the adults flying through, I also saw an adult at the park on the day I first saw the juvenile. More to the point, there had been reports of an adult on the Cam and possibly the same, or different bird, in nearby Chesterton and at Dernford Reservoir.

Juvenile Osprey, I suspect female as it did a lot of mock mating bows when I saw it on Sunday
Juvenile Osprey, I suspect female as it did a lot of mock mating bows

I think I missed seeing the juvenile catch a fish by minutes. When I caught up with it having hung around watching and waiting for an hour, it was eating a roach or a perch while being mobbed by corvids (magpies and jackdaws) on its usual oak perch in the park.

Pandion haliaetus – Sometimes known as the Sea Hawk, Rive Hawk, Fish Hawk. Only extant member of the genus Pandion. Molecular phylogenetic analysis shows that the Pandionidae is a sibling family to the Accipitridae and suggests that the two families diverged more than 50 million years ago. The Accipitridae includes the hawks, eagles, kites, harriers and Old World vultures.

Eurasian Ospreys appear locally

UPDATE – 23 October 2024: The juvenile Osprey that appeared in Milton Country Park on the 5th September was last reported on its feeding perch on 21st October. It seems that it had finally headed south for the winter.

Juvenile Osprey having a fish supper at Milton Country Park, Cambs
Juvenile Osprey having a fish supper on its favourite feeding perch at Milton Country Park

I asked expert Tim Mackrill, an ornithologist at the Roy Dennis Wildlife Foundation about the bird. “It is fairly common for juveniles to stop-over in this way during September and October, and some birds even stay into November, particularly on the South Coast [of England],” he told me. “Most juveniles depart their nest site before they have caught a fish for themselves, so if they encounter a location where they are catching fish relatively easily, they can often linger for a number of days or even weeks, as your bird did.” He adds that most Ospreys in England and Wales are ringed, but there are many Scottish sites where chicks are not ringed. “It is most likely that this was a Scottish youngster” he told me. “That said, some Scandinavian birds also pass through England on autumn migration, so that can’t be discounted either.”

If it reaches Africa, it will stay there for several seasons before flying back to somewhere near the place it hatched earlier in 2024 to seek a mate. Meanwhile, another migrating Osprey was seen at RSPB Fen Drayton on 22nd October.


Famously, there are nesting Ospreys at Rutland Water, which is probably the nearest spot we’d expect to see these breeding summer visitors. However, migrating birds on passage can turn up anywhere there’s water and fish if they sense a safe place to refuel on their journey to or from sub-Saharan Africa. I suspect the passage migrants mentioned in this post have flown in from much further north, Cumbria or Scotland, perhaps. No signs of leg rings and the Rutland birds are all ringed.

Eurasian Osprey in flight, Pandion haliaetus haliaetus
Eurasian Osprey in flight, Pandion haliaetus haliaetus

We have lots of gravel pits in this part of Cambridgeshire that have been repurposed as nature reserves and parks. One of them, Milton Country Park has seen lots of interesting birdlife over the last few years. You’re almost always going to see Kingfisher, Cormorants and various ducks and waders there as well as woodland birds and even occasionally exotic warblers. Geese numbers seem to be way down recently.

Back in late April 2014, a Eurasian Osprey turned up and hung around for a while. This was presumably a migrant heading north. The previous year one was present in September, presumably heading south. Prior to that 2008.

Eurasian Osprey, Pandion haliaetus haliaetus
Eurasian Osprey, Pandion haliaetus haliaetus
Eurasian Osprey in flight, Pandion haliaetus haliaetus
Eurasian Osprey in flight, Pandion haliaetus haliaetus

There’s an Osprey at Milton CP right now, first appearance, 5th September 2024 or thereabouts. It’s a juvenile. Not long after, an adult was seen on the nearby stretch of the River Cam at Bait’s Bite Lock. There have been some other local sightings in Chesterton and at Dernford Reservoir.

Mrs Sciencebase and I took a stroll around the Milton CP site on the morning of 14th September, and while we saw Kingfisher, there was no sign of any Ospreys. We had another try on the afternoon of the 15th and spotted one flying over one of the lakes. It was airborne for a few minutes before heading to a roosting point high in an oak tree, a spot others had seen it several times in previous days. We had great views of it in the air and then at its roost. It would occasionally bow, perhaps a precocious mating bow, so I suspect it’s a female. I saw no sign of it on the morning of the 16th September.

Male Kingfisher, Alcedo atthis
Male Kingfisher, Alcedo atthis

As we were leaving the park, we took one more look from a viewing jetty and saw another (adult) Osprey that had flown in from the direction of the River Cam. It had apparently fished briefly just before we saw it in the air and then it quickly disappeared back towards the river. This was definitely a second bird, as the roosting juvenile has a nick from one of its wings whereas this apparent adult did not.

Eurasian Osprey in flight, Pandion haliaetus haliaetus
Eurasian Osprey in flight, Pandion haliaetus haliaetus

County Bird Recorder, Jon Heath, interviewed in Cambridge Independent.