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Catherine Sheard

@sheardcat

Fellow @ University of Aberdeen. Professionally: macroevolution, especially birds & languages. Personally: drinks too much coffee, plays too much D&D. she/her

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31.05.2023
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Latest posts by Catherine Sheard @sheardcat

Quantifying the Impact of Fossil Age on Reconstructing Trait Evolution Using Phylogenetic Comparative Methods

πŸ“’ Including fossil tips in your phylogeny can double your continuous trait model fitting accuracy!

Updated preprint out now on @ecoevorxiv.bsky.social.

πŸ”— doi.org/10.32942/X27...

with @pedrolgodoy.bsky.social @macroecoevoale.bsky.social and @bethanyjallen.bsky.social

06.03.2026 19:00 πŸ‘ 23 πŸ” 15 πŸ’¬ 0 πŸ“Œ 2

Amazing πŸͺΏπŸ“–

06.03.2026 13:01 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

10/10, no notes, incredible πŸ˜‚

06.03.2026 13:01 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

I love attempting to decipher my Notes app.

"Koblenz"
"Rates of evolution"
"Birds in Scotland"

Past!Catherine, wtf πŸ˜‚

06.03.2026 09:47 πŸ‘ 5 πŸ” 0 πŸ’¬ 2 πŸ“Œ 0
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We know that marine fishes 🐠 have an inverse gradient of speciation compared to that of spp richness, with higher speciation at higher latitudes. But, what about freshwater 🐟?

Find out in the new PhD paper by Juliana Herrera-PΓ©rez and friends (not just colleagues) 🀿 πŸ‘‡

shorturl.at/zgKfA

23.01.2026 21:47 πŸ‘ 26 πŸ” 13 πŸ’¬ 1 πŸ“Œ 0
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No Evidence for Pace of Life Evolution Along Elevational Gradients in Squamate Reptiles Ecological conditions can significantly influence the trade-off between survival, growth, and reproduction, leading to evolutionary divergence in life-history traits among populations experiencing di...

No Evidence for Pace of Life Evolution Along Elevational Gradients in Squamate Reptiles | Sahlean & Martin, 2026 | Ecology Letters

onlinelibrary.wiley.com/doi/full/10....

05.03.2026 12:17 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Birds That Don't Exist: Niche Pre‐Emption as a Constraint on Morphological Evolution in the Passeroidea We use topological data analysis to reveal a persistent morphological gap in a major group of songbirds (superfamily Passeroidea). The gap remained unoccupied for millions of years, even though nearb...

Well damn, this is cool.

Birds That Don't Exist: Niche Pre-Emption as a Constraint on Morphological Evolution in the Passeroidea | Chia et al., 2026 | Ecology Letters

onlinelibrary.wiley.com/doi/full/10....

05.03.2026 12:14 πŸ‘ 35 πŸ” 14 πŸ’¬ 0 πŸ“Œ 3
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Uniqueness and predictability in evolution and the history of mollusks | PNAS Evolution is a historical process whose trajectories are determined in part by the introduction of new phenotypes. Although most phenotypes have ev...

Uniqueness and predictability in evolution and the history of mollusks | Vermeij & Thomson, 2026 | PNAS

www.pnas.org/doi/10.1073/...

05.03.2026 12:12 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

That's very kind of you, thank you!

05.03.2026 12:07 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Black Death Land Abandonment Drove European Diversity Losses Our analyses reveal rapid declines in floristic diversity at timescales coincident with the Black Death depopulation event, followed by a diversity rebound over subsequent centuries that mirrored the...

Black Death Land Abandonment Drove European Diversity Losses | Gordon et al. 2026 | Ecology Letters

Woah.

onlinelibrary.wiley.com/doi/full/10....

05.03.2026 12:07 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Wealthy Dubai residents race back to UAE to avoid tax bills Some risk spending too few days in the emirate and too many in the UK

Tax exiles stuck in London desperately trying to get *back* to Dubai to avoid becoming tax resident in the UK? Just great stuff. giftarticle.ft.com/giftarticle/...

05.03.2026 11:55 πŸ‘ 3885 πŸ” 1201 πŸ’¬ 201 πŸ“Œ 324

πŸ“‘πŸ“ŠWe have just uploaded a new pre-print where we decompose spatial, temporal and spatial-temporal variation in natural selection on reproductive traits for great tits and blue tits.
With Yimen Araya-Ajoy, @ellafcole.bsky.social and @sheldonbirds.bsky.social
www.biorxiv.org/content/10.6...

04.03.2026 19:01 πŸ‘ 10 πŸ” 6 πŸ’¬ 1 πŸ“Œ 1
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Limited thermal tolerance in tropical insects and its genomic signature - Nature A survey of tropical insect populations and thermal tolerance limits indicates that species from lowland areas have low capacity to survive increased temperatures, and that thermal tolerance is limite...

fantastic paper by @kimholzmann.bsky.social & colleagues presenting data on ~2300 insect species along two tropical mountain slopes

www.nature.com/articles/s41...

04.03.2026 20:00 πŸ‘ 6 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0
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What if the use of psychoactive substances, particularly alcohol consumption, had been a factor in the rise of socio-political complexity throughout human history?

Addressing this question is not easy, but it is worth trying πŸ‘‡πŸΌ

www.pnas.org/doi/10.1073/...

04.03.2026 12:34 πŸ‘ 5 πŸ” 5 πŸ’¬ 0 πŸ“Œ 1
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#NewPaperAlert! So incredibly proud of Katy Silber, former PhD student & post-doc for publishing ALL of the work she did in the lab. This last paper @pnas.org answers the question, how and why does rain matter to bird reproduction, *generally*? Here is the graphic summary... details below.
1/n

03.03.2026 15:32 πŸ‘ 14 πŸ” 5 πŸ’¬ 1 πŸ“Œ 2
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New paper out from @hoehna.bsky.social Lab, led by the brilliant @bjorntko.bsky.social! We applied the Pesto software (Kopperud & HΓΆhna, 2025) to look at lineage-specific shifts in diversification rate on large, densely-sampled phylogenies across the Tree of Life doi.org/10.1093/evle...

04.03.2026 13:14 πŸ‘ 42 πŸ” 24 πŸ’¬ 1 πŸ“Œ 1
Postdoc position -- Social Learning and Cultural Evolution Postdoc position -- Social Learning and Cultural Evolution posted on March 2, 2026 We are currently seeking a highly motivated individual...

πŸš€ Postdoc Alert! Are you passionate about social learning & cultural evolution? @dominikdeffner.bsky.social & I have a 3-year position with freedom to develop your research and work on cutting-edge multiplayer and immersive experiments. Apply by March 30! hmc-lab.com/SocialLearni... Pls share πŸ™

02.03.2026 10:45 πŸ‘ 59 πŸ” 62 πŸ’¬ 2 πŸ“Œ 3
Job Openings Explore exciting career opportunities at iDiv. Join a modern, international, and innovative research centre in the heart of Germany.

iDiv and @uni-jena.de are recruiting a Postdoctoral Researcher (f/m/d) in Trait-Based Community Ecology and Modelling.

Highlights:
πŸ”ΊFull-time (100%, 40 h/week) with the option to reduce to 80%
πŸ”ΊFixed-term for 2 years
πŸ”ΊSalary up to E13 TV‑L

πŸ“† Apply by: 29 March 2026

www.idiv.de/career/job-o...

04.03.2026 08:29 πŸ‘ 18 πŸ” 25 πŸ’¬ 0 πŸ“Œ 2
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🦎 Funded 4-year PhD position on Lizard Evolutionary Ecology in our lab at UCLouvain (Belgium)! Apply before 9 March! jobs.uclouvain.be/Personnelsci...

03.02.2026 13:50 πŸ‘ 28 πŸ” 46 πŸ’¬ 0 πŸ“Œ 2
PNAS Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans...

The global island species–area relationship for plants "a simple power model explains a remarkable amount of variation, with ISAR slope and residual variation explicable by isolation, island origins, and proportion of endemism" πŸ§ͺ🌐 www.pnas.org/doi/10.1073/...

03.03.2026 05:44 πŸ‘ 20 πŸ” 6 πŸ’¬ 1 πŸ“Œ 0
Learning from the past to inform future seabird conservation (PASTBIRD)

Learning from the past to inform future seabird conservation (PASTBIRD) - Local Ecological Knowledge, stable isotopes, seabird islands.

If you're wanting to do a PhD project with us, please apply by 1 April.

#phdvacancy

phd.tech.au.dk/for-applican...

02.03.2026 23:16 πŸ‘ 6 πŸ” 11 πŸ’¬ 0 πŸ“Œ 0

Between -1 and 1 presents for the very southernmost folks, -999 presents for everyone else, a Christmas scandal! πŸ˜‚

02.03.2026 23:03 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Extended follow-up of invasive cervical cancer risk after quadrivalent HPV vaccination: nationwide, register based study Objectives To evaluate the long term risk of invasive cervical cancer after receiving the quadrivalent human papillomavirus (HPV) vaccine, how risk varies by time since vaccination, and to assess the ...

The HPV vaccine is durably AMAZING.A massive Swedish registry study w 18 years of follow-up found no waning protection against invasive cervical cancer. If vaccinated before age 17, cancer risk is cut by ~80%. Even those vaccinated later still had substantial protection.
www.bmj.com/content/392/...

02.03.2026 22:09 πŸ‘ 564 πŸ” 239 πŸ’¬ 6 πŸ“Œ 24
A map of the world where the lower latitudes are in red (a value around 0) and everything about 30 S or so is in blue (a value around -999). A few places (e.g., interior Greenland, interior Sahara, Antarctica) are coloured white.

A map of the world where the lower latitudes are in red (a value around 0) and everything about 30 S or so is in blue (a value around -999). A few places (e.g., interior Greenland, interior Sahara, Antarctica) are coloured white.

You guys, I make the bestest maps of bird behaviour πŸ˜‚

02.03.2026 20:46 πŸ‘ 9 πŸ” 0 πŸ’¬ 2 πŸ“Œ 0
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Plant diversity estimates of Mediterranean islands differ among biodiversity databases Large-scale biodiversity databases encompass three main types of data for plants, namely single species point occurrences, co-occurrences in vegetation plots, and checklists for specific areas. Evide...

New paper in @ecography.bsky.social led by Francesco Santi from @unibo.it:

Plant diversity estimates of Mediterranean islands differ among biodiversity databases

We show complementary biases among biodiversity data sources and highlight the need for coordinated sampling and digitisation.

01.03.2026 10:24 πŸ‘ 12 πŸ” 5 πŸ’¬ 0 πŸ“Œ 0

I just received a rejection from a job that I applied to in...2022.

Fam, somehow, I'd already guessed that ship had sailed πŸ˜‚

01.03.2026 20:56 πŸ‘ 12 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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Bit of trivia regarding the trend of more US Americans moving abroad: we now have more Americans living in Norway than Norwegians living in the US.
πŸ‡ΊπŸ‡Έ βž‘οΈπŸ‡³πŸ‡΄

28.02.2026 07:01 πŸ‘ 64 πŸ” 25 πŸ’¬ 0 πŸ“Œ 1
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Limitations of molecular dating using constant birth–death rate priors in deep time reflected in Brachiopoda evolution Molecular dating often struggles to align with fossil records when divergence times are estimated in deep evolutionary history, particularly during th…

Limitations of molecular dating using constant birth-death rate priors in deep time reflected in Brachiopoda evolution www.sciencedirect.com/science/arti...

28.02.2026 05:49 πŸ‘ 26 πŸ” 13 πŸ’¬ 0 πŸ“Œ 0

(Also, pet peeve: I hate that so many British institutions insist on calling me "Miss". I am a full-grown woman, not a child! I always check either Ms or Dr on forms, so getting called Miss means that someone manually *overrode* my preference. Why even have a form then???)

27.02.2026 18:45 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
A list of titles. It starts with Mr/Mrs/Ms, but then includes options such as Family, Open, Inter, and Diverse

A list of titles. It starts with Mr/Mrs/Ms, but then includes options such as Family, Open, Inter, and Diverse

Relatedly, I was recently trying to purchase something on an Austrian website, and this was my list of titles to choose from for billing. I have QUESTIONS.

27.02.2026 18:42 πŸ‘ 2 πŸ” 0 πŸ’¬ 2 πŸ“Œ 0