This blog post isn’t about some supernatural Geordie, rather a species of owl that haunts the northern parts of the Americas and Eurasia- the Great Grey Owl (Strix nebulosa). It’s the largest species of owl we have, by length, although ignore the feathers and it isn’t quite so impressive looking, but then which bird is? Also known as the cinereous owl, spectral owl, Lapland owl, spruce owl, bearded owl, and sooty owl.
The sub-species S. n. nebulosa flies from central Alaska eastward across Canada to south-western Quebec, and south to northern California, northern Idaho, western Montana, Wyoming and north-eastern Minnesota. S. n. lapponica can be found in Fennoscandia through Siberia to Sakhalin and Kamchatka Krai to Lithuania, Lake Baikal, Kazakhstan, Mongolia, Manchuria and north-eastern China.
There are more than 11,000 extant species of bird around the world, they all evolved from the theropod dinosaurs of which Tyrannosaurus rex is perhgaps the most famous. They are a seemingly diverse bunch of animals from the tiny Firecrest and the Hummingbirds to the Emu and Ostrich by way of the Vultures and the Cockatoo.
There are 137 families of perching birds, the so-called passerine birds, which have three toes pointing forward and one pointing back. The Passeriformes account for almost two-thirds of all bird species and are found across the globe. The term passerine comes from the Latin word for that archetypal perching bird, the House Sparrow (Passer domesticus). Passero or passera is Italian for Sparrow.
Anyway, a new DNA analysis reveals that all of those thousands of species of Passeriformes have a common ancestor that lived 47 million years ago in Australia. Discussed in more detail by Eleanor Imster in EarthSky.
Meanwhile, a genetic analysis in Science this week, explains why that Australian resident, the Emu, and indeed Ostriches and other ratite birds cannot fly.
I seem to have inadvertently duplicated this article and then edited it. The original with my garden “list” can be found here.
Reader John S asked me to put together a report on the topic of what birds we are likely to see in our gardens here in the village of Cottenham a few miles north of Cambridge. I suspect there are a few of you who will have spent an hour back in January counting species for the RSPB’s Big Garden Birdwatch and so hopefully there are others would be interested to know what they might see.
Of course, which of our feathered friends turns up in your garden is down to many different factors, the size and layout of your garden, tree and other plant species, the presence of cats, whereabouts you are relative to patches of woodland, farmland, and whether or not the visitors find a useful supply of food in the form of berries on your bushes, seed feeders and bird tables, coconut shells full of suet, and whatever else you might put out to attract them.
Some birds will arrive in great numbers to feast on fatballs for instance. Most of us have been perplexed to see expensive fatballs disappear in a matter of minutes when a flock of starlings turn up. Other food, such as nyjer seeds in a specialist feeder will draw in Goldfinches and occasionally for some Redpolls. Sunflowers seeds with the husk intact, sometimes referred to as black sunflower hearts, will keep Greenfinches, Blue Tits, Great Tits, Coal Tits, and Long-tailed Tits busy, and if the nyjer seeds run out the Goldfinches too.
Robins, Blackbirds, Wood Pigeons, Collared Doves, Dunnocks, will spend much of their time pecking around under the feeders, although the Blackbirds will join Mistle and Song Thrushes plucking insects from the lawn. And, Thrushes will famously grab snail shells and smash them on the ground to get at the occupant. If it’s very cold out on the farmland, the winter thrushes – the Fieldfares and Redwings – will come into the warmer more urban areas and attempt to snaffle berries from your bushes and trees much to the consternation of the Blackbirds who will attempt to make them flee.
You might also spot Bramblings during the winter. They are another finch resembling the Chaffinch but brighter and more orange colours. I have heard from people on Broad Lane who see them in their gardens occasionally, but they are more likely to be elsewhere.
Unusual but increasingly common in the winter are Blackcaps, a type of warbler normally considered a summer visitor, but turning up in our gardens from Germany and Eastern Europe rather than heading to the Iberian Peninsula and North Africa. Speaking of summer, by the time you read this birds that you might see above your garden or heading into your eaves may have started to arrive: House Martins first, then the Swallows that don’t necessarily a summer make, and finally the Swifts. Listen out for Cuckoos too. Certainly houses on The Green backing onto farmland have regular cuckoos visiting for the breeding season.
If you have ants among your plants, you might see Green Woodpeckers, also known as Yaffles for their scoffing call in flight. Ants are the Yaffle’s staple diet, so hold off the powder if you want to see them pecking at the ground in your garden. And, speaking of woodpeckers, there are quite a few Great Spotted Woodpeckers around, which will often come to garden feeders. Of course, if you’re attracting lots of small songbirds to your garden you might also attract predators including Sparrowhawks and less obviously egg-eating Magpies, and chick-chomping Jays. Great Spotted Woodpeckers will also peck into birdboxes to eat baby Blue Tits and the like.
Another reader, Diana S, also pointed out that she’d had Reed Buntings in her garden and had seen Little Grebe and Teal on the reedy pond at the back of her housing estate.
Well, actually Toads of Anglesey Abbey. Common Toad (Bufo bufo) spawning in the bird-hide pond on the National Trust site in Lode, Cambridgeshire. Note, the toad spawn looks like a necklace of black beads on a string, whereas frogspawn forms in clumps. That said, there’s no real distinction between toads and frogs. Toads are just a type of frog (Bufonidae), just as butterflies are a type of moth.
These photos were taken at NT Anglesey Abbey on 21st March 2019. The spawning may well be over by now. There was also a Water Rail present on the opposite side of the pond.
Ask anyone who isn’t a moth-er to describe a moth and usually terms such as dull, grey, brown, night-flying, drab, dingy, useless are the ones that arise. Someone might go so far as to describe them as the boring relatives of butterflies. Well semantics aside, butterflies are just a sub-group of the moths, they’re all Lepidoptera, but they’re anything but useless and many of them fly during the day and are incredibly vivid and bright.
Perhaps the most vivid and bright of the British species is a moth I’d not seen until today, only in books. It is the Emperor Moth, Saturnia pavonia, the only member of the Saturniidae, the silk moths, found in the British Isles.
The males are very brightly coloured, the females a version where the colours look as if they have been desaturated. The male flies during the day, the female at night. Both male and female have a vivid spot on each fore- and hind-wing that give them the appearance of having two pairs of eyes looking back at a predator. The species is actually fairly common across the British Isles although it favours heathery heathland and open country, but that does include Fenland, of which we have plenty hereabouts.
Female Emperors [should that be Empress moths? Ed.*] exude a pheromone to alert the day-flying males to their presence and their urge to mate. The males can detect picograms of sex pheromone on the wing with their feathery antennae. Purportedly, they can sniff out a female from up to ten miles.
Other Saturniidae moths in Japan and the Americas seem to use hexadecadienals and esters of those compounds as their sex pheromones. I’m yet to find a paper that isolated and characterised the sex pheromone of S pavonia. Nevertheless, you can buy a little lure impregnated with the sex pheromone. A moth-er might hang such a lure in the garden on a sunny and breezy day in the hope of attracting an Emperor, which is what I did.
First sighting was today. He wouldn’t settle and I couldn’t safely net him, so I snapped away 100+ shots and maybe got 4 where the moth is in focus and in the frame.
We headed to Lakenheath, had a quick stop off to watch a load of F15, Strike Eagles, take off from the RAF base before bypassing RSPB Lakenheath and heading further out to a reserve we had not visited previously – the Norfolk Wildlife Trust’s Weeting Heath site.
Weeting Heath (Grid ref: TL 758 884) is right in the middle of The Brecks and one of the lookout hides looks out over arable land while the other has a small pond and lots of well-stocked feeders frequented by woodland birds including the usual array of Goldfinches, Chaffinches, Robins, Dunnocks, Collared Doves, Wrens etc as well Bramblings and Yellowhammers.
Cross the speedy road and there is a larger woodland patch with a circular walking route through the pines (although Forestry Commission and NWT were felling trees during our visit so some paths were closed off. Anyway, saw the usual array of woodland birds here but also heard Woodlark, which staff had mentioned as having been showing well that week. Back at the main site, I snapped the last of the Bramblings, several Yellowhammers, a Wren eating a caterpillar, and numerous Goldfinches.
There had been reports of Stone Curlew (Burhinus oedicnemus), and I caught sight of one of the five or so that had been showing. There was also a Kestrel in a lone tree and a solitary Lapwing on the same patch as the Stone Curlew.
Then, I dashed back to the main road when Mrs Sciencebase alerted me to a sighting of a winter buzzard that was in the area, a Rough-legged Buzzard, specifically. Unlike the more common Common Buzzard, the Rough-leg only over-winters occasionally in the UK. Second time she’s spotted one of these ahead of the crowd and we had seen one at Cley in North Norfolk in November 2018. I wasn’t back from the hide quickly enough to get a view of it low down but managed to snap it just before it disappeared into low cloud. Other birders arrived minutes later and never caught a glimpse.
Much to Mrs Sciencebase’s annoyance, I was awake at 6:40am today…her day off. I made a pot of tea, fed the dog, we drank the tea (Mrs Sciencebase and myself, not me and the dog), I then dressed and dashed off to RSPB Ouse Fen before the morning rush hour in the hoping of catching sight of a Bittern or two.
Well, I arrived to see lots of Linnets, Goldfinches, and Reed Buntings about. Skylarks cavorting with the Meadow Pipits, the sound of a couple of Chiffchaff and maybe four or five Cetti’s Warblers calling (I saw at least three of them), a possible Bearded Reedling “pew”, and the occasional boom of a male Bittern, from a couple of places, so perhaps two or more.
However, the big feature of the morning though was the five or six Marsh Harriers (Circus aeruginosus) that were doing their aerial courtship dance. The smaller, more patterned males with their darker heads chase the bigger females with their pale heads through the air and with each approach dive down to reed level. It’s a spectacular sight, be interesting to know how many were successful and whether numbers will rise again on this reserve.
I ordered a pheromone lure for the Emperor Moth from ALS today. It’s just arrived and now it’s hanging in one of those little laundry tab string bags, out in the garden, blowing in the breeze purportedly drawing in the male Saturnia pavonia…but nothing yet. It’s getting late in the day for this day-flying moth, so I might pack the lure away in a freezer bag in the freezer and try again tomorrow. Intriguingly, the female which looks like a greyed out version of the male is a night-flyer.
Meanwhile, I cannot find the chemical identity of the female sex pheromone for this species. I can’t seem to find a reference in my usual journal searching, although three US Saturnia species apparently use a long-chain aldehyde, (E4, Z9)-tetradecadienal. I will keep searching. This is where my passion for biology and chemistry overlap, you might say.
UPDATE: I discovered that S pavonia had two older names, not just Pavonia pavonia, but Eudia pavonia. As soon as I learned the latter, it was easy to find a research paper discussing the pheromone – (Z)-6,(Z)-11-hexadecadien-1-yl acetate, which is a close relative of another sex attractant pheromone, gossyplure, which is used in commercial breeding control of pest moths. Read more about it here.
This species is the only member of the Saturniidae that lives in the British Isles, it is found almost everywhere here from heathland to fenland, so there is a chance of at least one turning up. It is the poster-boy of the moth world. You can go away and look it up if you like, but I’ll only post a photo when I’ve snapped one of my own.
Whereas most of the familiar bees are black and yellow stripey creatures sometimes with a white or russet tail, the Ashy Miner Bee (Andrena cineraria) is black and white with a bit of blue…like a Magpie (hence my blog post title, The Magpies being the nickname of The Toon, Newcastle United Football Club, NUFC). Its name made me think ashy, sooty, pits and miners, obviously; once so common an association with the city to which you need not take coals.
This is a solitary bee, but the females will often make their nests in aggregates along grassy footpaths and short turf. Hence another football connection. I spotted this one on the raised footpath along the water at Earith in Cambridgeshire. Look down as you’re walking and you might spot them from March to June.
Just looking for a nature reserve that I may have missed in our local area when I found a website that discusses the many and varied places you could visit:
The Water of Grafham (Grafham Water), for instance
Then there was Ouse is Washing (Ouse Washes)
Cherries Hinton Chalk Pits (that would be Cherry Hinton)
But, I’m definitely going to RSPB Ouse Fen again where:
The bitters are joined by a support group composed of marsh harpoon hovering above and pretty bearded breasts hanging on the reeds, like small trapeze artists.
Presumably, they’re talking about Bitterns, Marsh Harriers, and Bearded Tits, but I could be wrong…
The only explanation for such a ludicrously badly written web page I can think of is that they ran the copy through an automatic grammar checker and accepted all changes without reviewing them. However, the site looks like the content is originally from the Cambridge News, so maybe the awful edits were done to make it subtly different from the original material.
Indeed, the original Cambridge news article uses this phrase in talking about the arrival of spring:
Pop on a jumper and some sturdy shoes
the “archive” site has:
Put on a sweater and solid shoes
The site also talks about “forests” whereas the original Cambridge News pages says “fenland”. As far as I know, there are no forests near Cambridge but plenty of local fenland; woods and spinneys yes, but not forests.
Oh and the Cambridge News talks of:
The bitterns are joined by a supporting cast of marsh harriers that soar overhead and charming bearded tits that cling to the reeds like little trapeze artists.