Taking stock at home

Maridalsvannet on the morning of 20th May

In Oslo it seems as though migration has come to end with rain and southerly winds causing absolutely nothing exciting to turn up. Svellet also still has mud but without there being a single wader reported this morning. Even though the period of quantity of passage birds has passed we are definitely entering the highest quality time and yesterday a stonking male Black-headed Bunting was pulled out of a mist nest in the garden of a twitcher who I had no idea had a ringers licence.

Almost all breeding migrants have now turned up with the first Rosefinches, Red-backed Shrikes, Marsh Warblers and Nightjars being reported now even if I have yet to see any of them yet.

My focus has now turned to locating breeding birds both for my own benefit and also a busy period of guiding that I have coming up. Hazel Grouse has been a real nightmare this spring. A long walk on 17 May with Mrs OB and The Beast took me past 8 or 9 territories where I have previously had the species but with not a single bird being found. Today I checked 3 territories in another area including “my pair” and did finally pull a bird out of the hat which I feel confident of being able to find again. Three-toed Woodpecker has also been a headache this year so a female that gave herself away tapping on a tree was a relief but she flew off without me being able to track her to a nest.

The two pairs of Black Woodpeckers continue to entertain with the one pair still applying the finishing interior design touches to their property and the other pair working hard to fill three noisy mouths with food. In this video you can see the male using over a minute and a half to feed them individually with food he is clearly regurgitating into his bill.

the male Black Woodpecker (svartspett) that is still putting the finishing touches to his property

and two of the three young in the other nest which is at a far more expected stage

Hobby (lerkefalk) today. I have only seen a single bird and heard no calling so do not believe a pair has returned yet

Black-throated Divers (storlom)

I watched a Wood Warbler (bøksanger) with nesting material in its beak fly onto the ground here. Can you spot the nest?

here it is and is of a similar construction to Willow Warbler (løvsanger) and Chiffchaff (gransanger) nests I have previously found

On the Lapwing front there are still two birds incubating and seemingly three broods of 4,1 and 1. With the two broods of single young the siblings were lost very early on but the remaining young are now half grown and will hopefully make it. The brood of 4 is a few days younger but the parents have done very well to still have all four alive.

Checking in on the owls

Yesterday, saw me on a friends and family guiding to the owls in Hedmark. It was very successful if, as always, tiring trip.

Two nesting Great Grey Owls included my back up nest which I visited for the first time and the pair that I have now previously visited which have acted in a very aggressive way without being on the nest. On yesterday’s visit the female again announced her presence by bill snapping when we were 50m away and could not see either her or the nest. She was perched quite high in a tree and continued snapping noisily whilst we watched her. It is quite uncomfortable being there when the bird seems so unhappy/angry so we didn’t hang around but I kept looking over my shoulder as we left just in case she flew at us but instead she flew onto the nesting platform and acted very much as though she was on eggs! But this raises a number of questions:

1.      Why was she not on the nest initially? My experiences with other nesting GGO over the years has always been that the females stay on the nest no matter what.

2.      Why does she continue to be so aggressive in her behaviour? At the other nest we visited the female made no noise and hardly seemed to follow our movements

3.      Why is she so late in egg laying? The eggs (if there actually are some) must surely have been laid since my visit with Jack on 5^th May whereas I know that at the other nest the first egg was laid on 22^nd April which I think is in itself a fairly late date.

the particularly aggressive female GGO in a tree

and then suddenly on the nest platform

and the other GGO nest which is much more luxuriously furnished

A check of the Tengmalm’s nest box resulted in no joy for my trunk scratching but I was able to attach the superzoom to the tripod and lift it up such that I could see through the hole and there were at least two large young in the box. A very thorough search of the area did not reveal any adults or other young that may already have jumped out although mum must have been very close by.

 

We checked just one of the Ural Owls nests. This was the nest where the female flew out when I scratched on 8^th April so with an incubation period of about 4 weeks I was ready for the young to already be large enough that mum was no longer in the box. This meant we need to be very careful as to how we approached the area and we walked a large semi circle around the nest box. The female gave away her presence by bill snapping and when we finally saw her perched about 30m from the box she flew away from the box as though trying to draw us away. Just a couple of steps by us towards the box though brought her right back and then she kept a very close eye on us (although we did not go any closer to the box for both our own safety and also her comfort). One thing that was odd was that she seemed to be panting almost all the time. It was only about +13C so was hardly hot and she wasn’t in direct sunlight but she was pumping her throat with her bill open (but not making any audible noises) for minutes on end. The young did not show themselves in the nest opening so are hopefully not ready to leave for 1-2 weeks.

Ural Owl (slagugle)

 

A stop to listen for Ortolan resulted in no joy and although it may still be a bit too early it would hardly be a surprise if none returned this year. The last confirmed nesting was my record in 2023 and the last two years have only seen a couple of unpaired singing males, one of which is very likely to have been the male from the 2023 nesting. So, it would be no surprise if these birds are now dead and with no recruitment to this population extinction has been unavoidable.

Oslo birding since my last post has continued to be quite uneventful with rain and southerly winds having no noticeable effect. The only highlight was a thirty minute mid afternoon period in Maridalen on the 16^th just after it had stopped raining and when the sun came out. This caused a Falsterbo lite experience with 3 Honey Buzzards, 4 Ospreys, 1 Common Buzzard, 1 Sparrowhawk and 4 Kestrels moving through. Wrynecks seem to be well established though with no a mating paid and two unpaired males and after struggling with Black Woodpecker I now have a nest that is still being excavated and another where two young were being fed at the entrance. At the nest which is still being excavated I saw no splinters being thrown out but could hear one of the adults (I’m quite sure the female) knocking away inside the hole and also on two occasions drumming inside the hole!

this Black Woodpecker nest must be at least 4 weeks ahead of the other one I found

And an interesting encounter with a Beaver that just swam straight down the white water rapids

Memories

I’ve long been itching for a seagaze. It didn’t need to be a particularly good one just as long as there were a steady passage of birds. Over 10 years ago I had for a few years the habit of driving the hour to Brentetangen, just south of Moss in Østfold and seawatching from there before visiting nearby Kurefjorden. I cut some of my Norwegian birding teeth doing this and had some good birds and company doing so. Brentetangen used to attract quite a gang on good days but these days seems to get little attention. Serious birders are become a scarce species not just in Oslo but it would seem all over Norway.

I’d been looking at Windy.com for a few days and had highish hopes that yesterday would deliver some north bound passage over the sea. After a long period of northerly winds they were finally going to swing south on Thursday afternoon so by Friday there should be loads of birds. The winds did not end up being quite so southerly as initially forecast and it was quite cold but I still think that I should have seen more than I did which in terms of migration was pretty much nothing. Gannet and Kittiwake were good birds for me and are both species that usually need a real southern storm to end up Akershus waters but just 20km further south are fairly regular no matter the weather.

the view from Brentetangen looking 10km across the fjord to Vestfold

 

Kurefjorden was also disappointing with 18 Dunlin being the only calidris waders although I was sure I heard a BbS.

and Kurefjorden. I was expecting waders to be dropping out of the skies

 

Question now is how many years will it be before I try the Østfold combo again?

 

Thursday was another of those religious public holidays that Norway loves «celebrating» but for which 90% of the population have no idea why - it was of course Ascension Day and if you also don’t know what that represents then I recommend Google…

The winds may have been from the north in the morning but finally it was raining and the clouds heavy and low. Surely this would draw all the remaining serious Oslo birders out of their warm beds? Fat chance but as there seemed to be little to find maybe they were just birding smart.

I decided to keep it local. Maridalen early doors was just wet but Østensjøvannet had ca.300 Swallows and martins. I promise I looked at every single one but a red rump was not to be seen. Such a large congregation was a joy to see as the last couple of years have not seen scenes like this and means the lake again must have good numbers of insects.

just a small fraction of the Swallows (låvesvale) and a single Sand Martin (sandsvale)

Back in the Dale around 11am there was a very brief period when the rain stopped and waders flew over: a flock of Wood Sands, a couple of Greenshank, 3 Whimbrel then 160 Golden Plovers. And then it was over.

most of the Golden Plover flock (heilo)

I allowed Jr Jr to have some driving practice and drive me to Svellet but despite water levels not having risen and rain having fallen there were hardly any waders. This is strange given the passage I had over Maridalen and also a fall of arctic bound waders reported at Øra but I have noted this before that when other places experience fall like numbers of waders that Svellet can be nearly empty of birds.

 

Maridalen has had some exceptional days in late April and May always when there is rain and heavy, low cloud but they are not happening with the regularity I remember although I am sure that they didn’t happen quite as much as rose tinted memory tells me. Looking at the numbers it is actually seven years since the last big day which was 10th May 2019 but that will perhaps be a day never to be repeated.

 

This morning’s pre breakfast Maridalen visit was no less uninspiring that the last few days except for one bird that was totally not on my radar - a Taiga Bean Goose. This was my first record in the Dale although there is a previous record (but I remember seeing that bird and choosing not to put it on my list as such).

I finally found nesting Black Woodpeckers although they were still excavating which is very late. Three Great Spots were also drumming which again is late - both these species should be on eggs by now. Two Wryneck singing in the same area were to be more expected at this time of the year but no less exciting for that.

I nearly didn't pay these geese any attention but with the nakes eye thought that the bird second left looked a bit like a young White-fronted Goose (tundragås) one of which was found yesterday at Østensjøvannet. Through the bins it proved to be a Greylag but I continued looking at the other geese and the one of the top was a Taiga Bean!!

here the head and bill shape leave me in no doubt

just based on this picture though I am sure you could rgue for both Tundra and Taiga although I think the bill shape can only match Taiga and the extensive orange is also a very pro Taiga feature

It was also a large bird with a swan like stature

I would not say this bird is a classic Taiga but believe that most features are pro Taiga. I also must say that I do hate single Bean Geese and it would be much more convenient if the two species were lumped again

in the river it was also upending which I also view as pro Taiga

I had been hearing Black Woodpeckers (svartspett) and was sure they were nesting so went looking for a suitable tree and hole. These huge splinters on the road! gave away where they were.

The big lull

It’s been a long while since my last post and it has been an infuriating time but I’m sure I’ve written something similar many times before at this time of the year. We have entered what a lull with sunny, dry weather meaning no meaningful arrivals of birds and also difficult viewing conditions especially at Årnestangen and Svellet where long distances and hear haze become a real issue.

It is spring though and of course new birds are arriving but it is a trickle and there is no volume of birds. Slavonian Grebes have made their annual visit to Maridalsvannet, a visit that seems to come earlier and earlier each year. Other species that have arrived early are Wryneck, Pied Flycatcher, House Martin and Willow Warbler but raptor migration is still a dream despite me trying from a variety of places – I have yet to see a Hen Harrier let alone a Pallid..

I have just had two good days of guiding with Margie and Greg from Wisconsin where we racked up 85 species with Wryneck, Lesser Spotted Woodpecker, Ring Ouzel and Rough-legged Buzzard amongst them. Despite us starting the day early it became quite hard going after around noon with the sunny weather causing a real decline in activity. This sunny weather is forecast for at least the next 10 days so I fear that the magical Svellet spring that I was predicting may already be unlikely. The day we do get some rain though could end up being one of those days though.

 

After guiding and drop off at the airport I continued north for an evening in owl land. I twitched a Great White Egret on the way which I actually managed to see from the motorway at 110km/h but did also stop to admire a bit better.

Owls are a mixed picture. Ural Owls are giving me my best ever joy with the species with two nest boxes that I have checked now being occupied - this amounts to nearly 10% of the known Norwegian population!

Great Grey Owl though is a different story. I again visited the two nests from last year and found no birds by the natural nest. By the platform the female was still present but not on eggs. She is a strange one though and gave herself away by bill clicking when I was still close to 50m away and had not yet seen her. She is clearly territorial. 

 

One person who knows a lot more about owls than me reckons it is just still early in the season and that birds will nest and lay eggs whereas another reckons the rodent population has collapsed. Time will tell but unless they lay eggs in the next week or two it will be too late. In the Facebook group Ugler i Norden there are updates from a platform that has a camera watching over it. Here birds were first seen coming to the platform already 22 Feb and mating was observed from 7 April but the first, and so far only?, egg was not laid until 2 months later on 21 April. This to me suggests a pair who want to breed but are finding the food situation very borderline.

When in the forests a roadside female Capercaille was a treat and I continue with my tree scratching whenever I see a suitable hole. This time I did get a bird but and a Stock Dove was very unexpected given where I was but why oh why couldn’t it have been a Tengmalm’s?

Six Slav Grebes (horndykker) on Maridalsvannet - an Oslo record count!

a single bird two days later may well have been in addition to the six

Two Ring Ouzels (ringtrost) - it always feel like a big relief when I see these in the spring as it is a species I never feel guaranteed to see in Oslo (but do)

female Lesser Spotted Woodpecker (dvergspett) whilst guiding. This bird was making a lot of noise and was I reckon unpaired and getting desperate

my first Wryneck (vendehals) of the year and another good bird to see whilst guiding

a great looking old Black Woodpecker hole that I was sure would reveal a Tengmalm's Owl (perleugle) but instead and for me very surprisingly revealed a Stock Dove (skogdue). At least my tree scratching skills seem to be OK now.

roadside female Caper (storfugl)

Great White Egret (egretthegre)

Great Grey Owl (lappugle) - the same bird as in my previous owl post

Ural Owl (slagugle) - also the same bird as in my last owl post

but he she is with her mate (on the left). I have rarely encountered the male at a nest site and then they are normally much shyer than this bird seemed to be. He flew in after the female called and maybe felt he had a job to do

and Ural Owl nest #2. This box is old and the bottom starting to fall out perhaps suggesting that whoever put it up no longer checks it and I hope it survives the season

Maridalsvannet on Monday morning. Lovely weather but no many birds

a very long, straight road in Hedmark's deep forests

A pair of Ringed Plover (sandlo) is clinging on at Fornebu and here, and in the video, the male is creating nest scrapes for the females approval. The area they were doing it in was very close to paths and roads so I suspect they will struggle.

I finally managed to read the rings on the Mute Swan (knoppsvane) pair that is visiting Maridalsvannet this spring. Surprisingly they are not the same pair that bred last year which have established themselves at Fornebu now. This pair have  been seen together since March 2025 when they were at Østensjøvannet but did not breed . The female P576 was ringed as an adult in 28km away in March 2017 so is a mature lady. She bred in 2022 with another mate but did not raise young whilst the male was ringed as a juvenile in November 2023 11km away and is so young that he wouldn't have been expected to breed before now

I have also seen Long-eared Owls (hornugle). They were a pair by an old Crow's nest but it did not appear that eggs had been laid yet

Farewell winter, good (tomorrow) morning spring

A final post before the first migrants arrive and all hell breaks lose (in my dreams).

 

If the weather forecast plays out then today marks the end of this winter’s big freeze and from tomorrow positive temperatures, some rain and southerly winds will hopefully kick start the first wave of spring migration 2026.

 Winter had a final gift in the form of a big dump of snow on Sunday night and this extra snow will, I hope, ensure we get some good spring flooding that hopefully will last many weeks. I really hope that Hengsenga on Bygdøy will have flood water until at least the beginning of April as I believe there is the potential for something very good here.

I have seen some signs of spring despite the weather not yet having changed. A Wood Pigeon heading north on the early morning dog walk on Tuesday will be the first of very many and a Greylag Goose looked a bit forlorn on the ice at Østensjøvannet but today provided another two and better species. In my last post I listed three early migrants that I hoped to find soon and all had names beginning with S. After writing it I realised I could have added another S species to the list, namely Stock Dove. When visiting Bygdøy today hoping to find the first Oystercatcher of the year I stopped off to see if any Stock Doves had returned to their usual spot and sure enough one was sat atop a usual tree which is Oslo’s first in 2026. Huk didn’t have an Oystercatcher yet but a flock of 8 Twite flying over were also Oslo’s first of the year but rather than being migrants may be birds that have wintered on islands close by taking a bit of a fly about. 17 Guillemot on a flat sea was a notably high count for the time of the year but I couldn’t find any divers or grebes which should soon appear.

 

I am really looking forward to the coming week and have high hopes for both Bygdøy and Østensjøvannet but think Maridalen may have to wait a bit longer as there is still so much snow.

a total of 4 Little Grebes (dvergdykker) at Kongshavn on Saturday. This is a joint highest count for Oslo and I would love to know where these birds breed

they acted as though they were two pairs and called a bit but are not yet in summer plumage

Østensjøvannets female Pintail (stjertand) now with bling

Pygmy Owl (spurveugle) in Maridalen on Sunday

Greylag Goose (grågås) at Østensjøvannet on Monday

my first Lesser Spotted Woodpecker (dvergspett) of the year. It was not drumming or "singing" but gave itself away through its weak tapping

Maridalen at its wintery finest

distant Pygmy Owl on Tuesday

and much closer

here, it had just visited the old woodpecker hole which I photographed it in in my last post and flew out with this mouse! I have assumed that this particular bird is living off its larder at the moment as when I see it in tree tops it is just looking as though it is enjoying the view rather than hunting

The first Greylags at Bygdøy Kongsgården but I bet that in a weeks time there will be triple figures here and hopefully with some smaller, scarcer cousins in their midst

Oslo's first Stock Dove (skogdue) of the year

Water Rail (vannrikse) still going strong at Østensjøvannet

and Jacky Boy is also still going strong. The upcoming thaw will be good news for them but will also, I fear, make them more difficult to find