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Keith McMahon

@mcmahok.bsky.social
1.1K followers 1.7K following 221 posts

Immigrant. Field site manager for the Wytham tit project. Bird ringer. Sports fan. Sometimes gets annoyed by politicians. He/Him

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Reposted by Keith McMahon
Devi Satarkar @devisatarkar.bsky.social · 23/09/2026
Heavier great tit nestlings 🐥 usually end up as heavier adults 🐦. Is this always a strong correlation? Our new preprint shows that the strength of this 'silver-spoon' association shifts continuously with environmental context, and is stronger in harsh conditions! www.biorxiv.org/content/10.6...
14-day old great tit (Parus major) nestling in hand. Bird handled under appropriate BTO licence. Adult great tit (Parus major) in hand. Bird handled under appropriate BTO licence.
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Reposted by Keith McMahon
Natalie Cooper @nhcooper123.bsky.social · 23/09/2026
Our update to the BES Data Management Guide is now live! assets.britishecologicalsociety.org/2026/09/2110... Huge thanks to the incredibly talented ECRs who contributed sections. It's an excellent resource that I've already used with my PhD students. ❤️
Cover image of the Data Management guide. Blue cover with a puffin on it! Also features the BES logo, Better Science Guides and our mission Through science we can.
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David López-Idiáquez @davididiaquez.bsky.social · 10/09/2026
Our pre-print analysing the 1 std decline in mass in Wytham great tits has just been published in @animalecology.bsky.social check it out: besjournals.onlinelibrary.wiley.com/doi/10.1111/... @biology.ox.ac.uk
besjournals.onlinelibrary.wiley.com
Early‐life environment drives long‐term decrease in adult body mass in a wild bird population
Using more than 90,000 body mass measures of adult and nestling great tits Parus major, we show that the 1 SD decline in adult mass between 1978 and 2024 is a consequence of changes in the environmen....
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Portland Bird Observatory @portlandbirdobs.bsky.social · 02/09/2026
The Northern Bottle-nosed Whales off East Cliffs this morning: youtu.be/bw2dzcI1IUE?...
youtu.be
Northern Bottle-nosed Whales, Portland Bill, 2nd September 2026
YouTube video by Martin Cade
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Keith McMahon @mcmahok.bsky.social · 20/08/2026
Have this terrible video of me trying to film a humming bird hawk moth on the buddleia iny garden
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Keith McMahon @mcmahok.bsky.social · 20/08/2026
Future Islands look like a super group made of Jeff Goldblum, Ricky Gervais, @sjpemberton.bsky.social and @mikewozniak.bsky.social
A group photo of the band future islands
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Reposted by Keith McMahon
Nilo @nilomr.bsky.social · 18/08/2026
A pleasure to have contributed some science and graphics to The Wonder of Birds at the @bodleian.ox.ac.uk; inspired by @robgmacfarlane.bsky.social’s words and Jackie Morris’s art, curated by Antonia Harrison. Free admission, through 3 January 2027.
Exhibition gallery showing a large black panel titled “The Shape of Song: A Living Cultural Soundscape”, featuring colourful visualisations of bird song, alongside displays of bird illustrations and books. Text explains bird song as animal culture and maps recordings of great tits from Wytham Woods. A QR code links to an interactive version of the graphic.
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Reposted by Keith McMahon
Peter Jukes @peterjukes.bsky.social · 18/08/2026
Here‘s the real story from @nafeez.bsky.social The Peter Thiel-Linked Race Science Network that Penetrated Cambridge University and Targeted Jason Arday bylinetimes.com/2026/08/18/t...
bylinetimes.com
The Peter Thiel-Linked Race Science Network that Penetrated Cambridge University and Targeted Jason Arday
The media's coverage of the academic's life was fuelled by the campaign of an established far-right network
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Reposted by Keith McMahon
Grace Robertson 🏳️‍⚧️ @graceonfootball.com · 16/08/2026
Annual reminder that the Community Shield used to be called the Charity Shield, but so little money actually went to charity that the government told them to either start making serious contributions or change the name. So they changed the name.
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Keith McMahon @mcmahok.bsky.social · 16/08/2026
You don't see the comb over that often in football these days. #Donnarumma #communityshield
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Keith McMahon @mcmahok.bsky.social · 01/07/2026
To the surprise of no one, one of those "protect women and children from foreign invaders" ghouls turns out to be a sex offender.
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Keith McMahon @mcmahok.bsky.social · 30/06/2026
Serena is 44! #wimbledon
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Keith McMahon @mcmahok.bsky.social · 25/06/2026
But 1976 was fine...
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Keith McMahon @mcmahok.bsky.social · 25/06/2026
Jesus Christ, the 1976ers have to be the most insufferable bunch of people. Making this heat wave even harder to endure. #climatechange #ukheatwave
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Keith McMahon @mcmahok.bsky.social · 11/06/2026
Apart from anything else, it's the unionists rioting, the last thing they want is to be Irish.
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Peter Jukes @peterjukes.bsky.social · 10/06/2026
“The truth is that the global far right have spent the past few years using a billionaire-owned social media platform to deliberately whip up racist violence on Britain’s streets and now they are finally starting to succeed.” @adambienkov.bsky.social bylinetimes.com/2026/06/10/t...
bylinetimes.com
Tommy Robinson, Nigel Farage and the ‘Pure Cold Rage’ Used to Trigger a Racist Pogrom in Belfast
Mainstream politicians have stood by as the global far-right campaigns for anti-migrant violence on our streets. Now we're suffering the consequences, argues Adam Bienkov
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Edward Grey Institute @egioxford.bsky.social · 03/06/2026
Scarcely into June, and already more or less completed this year's tit field season in Wytham, marked with the now traditional group photo. Great teamwork once again led by @mcmahok.bsky.social with excellent support from @ellafcole.bsky.social & Sam Croft. Will update with some data summaries soon!
The 2026 Wytham Tit project field team posing in a Sweet Chestnut Tree. Picture shows 12 fieldworkers sititng in various places on branches and one standing on the ground, surrounded by lush summer vegetation
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Reposted by Keith McMahon
David López-Idiáquez @davididiaquez.bsky.social · 31/05/2026
This week has been one of the warmest on record in Oxford. This heatwave has also been recorded by the thermologgers we have in @wythamwoods.bsky.social. The period between 23rd and 28th May has been ~8°C (+2.6 SDs) warmer in 2026 than the same period between 2023 and 2025.
Temperature anomalies in May in Wytham Woods between 2023 and 2026. Each line represents the temperature departure from the 4-year mean each hour. In orange, we can see 2026 temperatures which between the 23rd and 28th of May were 8.11º C higher on average than the mean of the 2023-2025 period (representing a difference of 2.6 standard deviations). Data comes from 8 thermologgers. Thick lines represent the average of these 8 loggers and thin lines temperature from each individual logger.
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Keith McMahon @mcmahok.bsky.social · 25/05/2026
Not much in the moth trap last night. First outing this year. Did get my first Lime hawk moth and the invasive Australian orange tip (also a first for the garden).
Lime hawk moth on my sons fingerAustralian orange tip moth
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Keith McMahon @mcmahok.bsky.social · 08/05/2026
Reform won 2 seats in my district 😭. Shocking turnout 40%. Yes everyone moaning about the state of town on local Facebook groups.
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Ben Sheldon @sheldonbirds.bsky.social · 08/05/2026
Happy 100th Birthday Sir David! Short clip from a film with Sir David Attenborough featuring @ellafcole.bsky.social explaining research in @wythamwoods.bsky.social into how Great Tits adjust behaviour during incubation to fine-tune hatching date: www.youtube.com/watch?v=lGjL...
youtube.com
How Do Birds Incubate Their Eggs? | Attenborough's Wonder of Eggs | BBC Earth
YouTube video by BBC Earth
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Keith McMahon @mcmahok.bsky.social · 08/05/2026
Happy 100th Birthday to David Attenborough. They say never meet your heroes. He was as awesome as you'd imagine. Made everyone feel special the day he came to Wytham Woods to film the birds and their eggs.
Me handing a great tit to David Attenborough in Wytham Woods.
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Keith McMahon @mcmahok.bsky.social · 02/05/2026
Also to hell with audible and Spotify for audiobooks, get the British library app, Libby. Loads of stuff there to listen to
Screenshot from the Google app store. Shows the Libby library app.
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Keith McMahon @mcmahok.bsky.social · 29/04/2026
Lesser white throat singing in my back garden this morning. A first. Lots of them about so far.
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Reposted by Keith McMahon
Devi Satarkar @devisatarkar.bsky.social · 22/04/2026
Planning a nestbox temperature manipulation experiment in birds? We’ve just published a preprint that may be useful! 🪺🪶 We review 46 studies and also share our own blue tit pilot experiment from Wytham Woods, highlighting some very real practical challenges doi.org/10.32942/X25387
a blue tit peeking into a wooden nestbox
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Natalie Cooper @nhcooper123.bsky.social · 22/04/2026
We’d really love it if you came! It’s an incredible program but we struggle to advertise for reasons. So if you’re interested in saving the planet please join us! www.nhm.ac.uk/events/gener...
Illustration of a small bird (goldcrest) facing the viewer with the words “appealing look” highlighted next to it
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Keith McMahon @mcmahok.bsky.social · 17/04/2026
St.Marks flies out in their thousands today, never seen so many.
A St.Marks fly resting on the road
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Reposted by Keith McMahon
Edward Grey Institute @egioxford.bsky.social · 16/04/2026
First sight of a new generation... The first Great Tit eggs have hatched in Wytham Woods this morning.
A quick photo of a Great Tit nest in Wytham Woods, taken during standard nest-monitoring protocol. A female Great Tit lying to one side on the nest, with three eggs and two just hatched nestlings visible in a nest constructed of moss and animal hair
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Keith McMahon @mcmahok.bsky.social · 15/04/2026
bUt wHy sHOulD we dO nEt zERo wHeN INdIa aNd CHiNa dONT
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Keith McMahon @mcmahok.bsky.social · 14/04/2026
Couple of woodland inhabitants spotted while checking nest boxes yesterday. A shiny pill millipede and a common Morel. Have never seen a morel in the woods before.
Common pill millipede on mossCommon Morel fungus
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Keith McMahon @mcmahok.bsky.social · 08/04/2026
The bluebells are peaking in Wytham Woods already. About 15-20 days earlier than normal.
Bluebells in a woodland
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Sienna Rattigan @siennarattigan.bsky.social · 04/04/2026
1/🧵My first preprint!🐛🌡️ We examine how environmental effects experienced during one life-history stage persist and modulate environmental responses in later life-history stages. With Lea Beaupere, @sheldonbirds.bsky.social, @rona-learmonth.bsky.social www.biorxiv.org/content/10.6...
biorxiv.org
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Keith McMahon @mcmahok.bsky.social · 01/04/2026
Yes, David!! www.theguardian.com/tv-and-radio...
theguardian.com
‘We didn’t want to be preachy’: David Attenborough’s unexpected new show – which might enrage cat lovers
The great naturalist, who is about to turn 100, is still surprised by wildlife in his new series about British gardens. But not every pet owner will be happy with his top tips
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Reposted by Keith McMahon
Edward Grey Institute @egioxford.bsky.social · 25/03/2026
🚨🚨 Breaking news from Wytham Woods: The 80th year of data collection of the long-term tit study officially started today with this nest with 3 Blue Tit eggs (pic: @mcmahok.bsky.social). First egg inferred 23 March which is our earliest EVER nest - beating the previous record of 26 March by 3 days!🚨🚨
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Devi Satarkar @devisatarkar.bsky.social · 11/03/2026
My second DPhil paper is out! A nice example of how continuous long-term monitoring of natural populations can be so valuable for understanding impacts of climate change on wild animals 🪶 📍Wytham Woods, Oxfordshire 🌳🪺
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Keith McMahon @mcmahok.bsky.social · 09/03/2026
A no brainer at this stage, if it wasn't already.
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Keith McMahon @mcmahok.bsky.social · 07/03/2026
#rugby 😂
A generic England rugby player and a generic welsh rugby player fighting over a wooden spoon.
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Keith McMahon @mcmahok.bsky.social · 06/03/2026
Pretty sure this guy isn't anywhere near this tanker.
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Keith McMahon @mcmahok.bsky.social · 05/03/2026
Spring has sprung in Wytham woods today. Chiffchaffs singing (first I've heard here this year), and a surprise firecrest in the mist net.
FirecrestChiffchaff
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Alex Tomlinson @alextomlinson.com · 25/02/2026
A flat, colorful poster that reads "Avert Catastrophe! Home is where your cat should be" (Originally from 2021!)
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Keith McMahon @mcmahok.bsky.social · 19/02/2026
notopalantir.goodlawproject.org/email-to-tar...
notopalantir.goodlawproject.org
Say no to Palantir in the NHS
NHS England is rolling out software to run our health records from Palantir - fight back
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Keith McMahon @mcmahok.bsky.social · 16/02/2026
Great pre-print led by @davididiaquez.bsky.social discussing possible causes of declines in adult and nestling mass. I suggested it be titled "Weapons of mass reduction"
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David López-Idiáquez @davididiaquez.bsky.social · 15/02/2026
We have published a new pre-print showing a decline in great tit adult and nestling mass of around 1 gram in 47 y. [rate of approx. -0.040 Hadanes] With @ellafcole.bsky.social, @devisatarkar.bsky.social, Sam. Crofts, @mcmahok.bsky.social & @sheldonbirds.bsky.social www.biorxiv.org/content/10.6...
Decline in body mass in adult (left) and nestling great tits. In the nestling plot, the purple line represents all nestling and the green line those that recruited to the population as breeders. Their different slope suggest an increase in the strength of selection on nestling mass something confirmed in the MS by analysing the temporal trends in selection differentials (see link for further information)
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Theo Sanderson @theo.io · 08/02/2026
I made a map of 3.4 million Bluesky users - see if you can find yourself! bluesky-map.theo.io I've seen some similar projects, but IMO this seems to better capture some of the fine-grained detail
bluesky-map.theo.io
Bluesky Map
Interactive map of 3.4 million Bluesky users, visualised by their follower pattern.
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Reposted by Keith McMahon
David Ho @davidho.bsky.social · 03/02/2026
Someone make it happen.
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Keith McMahon @mcmahok.bsky.social · 02/02/2026
Still time to apply for our spring field assistant roles on the Wytham tit project. Deadline this Sunday. Wonderful work in a wonderful setting (but I'm biased). egioxford.web.ox.ac.uk/event/short-...
egioxford.web.ox.ac.uk
Short-term Field Assistants: Bird Ecology – Spring 2026
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Andrea Estandía @andreaestandia.bsky.social · 31/01/2026
New preprint! 🐥🦠🏝️ We study a great speciator, the silvereye, to test whether parasites follow island biogeography rules, and find that parasite diversity and isolation effects depend strongly on transmission strategy. Led by PhD student Sarah Nichols. www.biorxiv.org/content/10.6...
biorxiv.org
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The Onion @theonion.com · 30/01/2026
RFK Jr. Demonstrates How To Remove Tapeworm By Scooting Ass Across Carpet theonion.com/rfk-jr-demonstrates-ho…
RFK Jr. Demonstrates How To Remove Tapeworm By Scooting Ass Across Carpet
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Keith McMahon @mcmahok.bsky.social · 28/01/2026
@tntsports.zpravobot.news.ap.brid.gy Can someone tell Matterface how to say Wirtz properly.
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