Louis Backstrom

Louis Backstrom

@louisbackstrom.bsky.social

PhD student within CREEM at the University of St Andrews. Statistical ecology, conservation biology, citizen science, birds, etc.

130 Followers 190 Following 7 Posts Joined Apr 2025
1 month ago
Close-up of delicate pink and white fuzzy flower held in hand. Text reads "FOR 60 YEARS, PEOPLE THOUGHT THIS PLANT WAS EXTINCT" Field of silvery-pink feathery flowers growing among grasses. Text explains Ptilotus senarius hadn't been seen since the 1960s until someone shared it on iNaturalist.
Ground view of flowering plant growing in rocky soil. Text reads "On iNaturalist, community members helped confirm this species had survived, unnoticed, for decades." Flowering plants in Australian bushland with eucalyptus trees. Text reads "SOMETHING THAT LOOKS ORDINARY MIGHT SURPRISE YOU — AND EVERYONE."

Ptilotus senarius hadn’t been seen since the 1960s. People thought it was extinct — until nature-enthusiast and horticulturist Aaron Bean came across it and shared an observation to iNaturalist. There, community members helped confirm what once seemed impossible: this species had survived.

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1 month ago
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Citizen scientist re-discovers Australian plant thought extinct for nearly 60 years A plant which was last collected 58 years ago has been rediscovered thanks to photographs presented on the citizen science platform iNaturalist. Ptilotus senarius is a small shrub found in the north of Australian state Queensland. The species was only named in 2014 after analysis of herbarium specimens from 1925...

A horticulturalist putting bands on birds in a remote part of QLD saw an interesting plant.

He uploaded photos to a #CitizenScience app, where a Queensland Herbarium botanist saw them and recognised a plant thought to be extinct:

connectsci.au/news/news-pa...

@ausjbotany.bsky.social #AusJBotany

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1 month ago
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A Typology of Australian Terrestrial Bird Communities Aim Holistic measurement of the response of fauna communities to interventions requires suitable community condition metrics. However, the development of such metrics is hindered by the absence of b...

Thrilled to be part of this new study that aims to derive a meaningful classification of distinct and recognisable Australian terrestrial bird communities. Lead by @martinemaron.bsky.social and Hannah Fraser with many other colleagues check it out here.

onlinelibrary.wiley.com/doi/10.1111/...

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1 month ago
IMAGE SHOWS GRAPHIC OF CORNELL LAB OF ORNITHOLOGY PHYLOGENY EXPLORER TOOL.

MAJOR NEWS! We just launched an awesome new tool! The illustrated Birds of the World Phylogeny Explorer lets users trace any bird’s lineage, compare species relationships, and explore major evolutionary milestones with a click of a button. SHARE and EXPLORE! birdsoftheworld.org/bow/news/phy...

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1 month ago
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The @theseabirdgroup.bsky.social 1992 conference was sponsored by shortbread and whiskey!

We need more of this.

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2 months ago
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Guidelines: - Best Practice for Using iNaturalist in the UK: Best Practice for Using iNaturalist in the UK A practical, optional guide to help your observations integrate smoothly with the UK biological recording system This guidance is entirely optional. You...

forum.inaturalist.org/t/guidelines...

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2 months ago
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Great to attend #BES2025 in Edinburgh this week, and to have the opportunity to share some of my PhD work with conference attendees!

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3 months ago
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We churned through over 100 million radar samples to quantify the structure of migration through the airspaces across the United States: Just out in Ecology esajournals.onlinelibrary.wiley.com/doi/epdf/10....

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3 months ago
Far eastern curlew illustration by @terngirl

Richard Fuller, winner of the #AOC2025 Serventy Medal, talks about migratory birds in Australia. From shorebirds that use the East Asian – Australasian Flyway to surreptitious night-time migrant, the story of bird migration is far richer than most of us realise. www.fullerlab.org

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3 months ago
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So excited to shared this project lead with @fredericddb.bsky.social and many enthusiastic ecologists. We played as predators and prey and with quite simple rules and were able to reproduce phenomenon observed in nature. doi.org/10.1111/2041...
@methodsinecoevol.bsky.social

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4 months ago
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GitHub - hadley/genzplyr: dplyr but make it bussin fr fr no cap dplyr but make it bussin fr fr no cap. Contribute to hadley/genzplyr development by creating an account on GitHub.

Do you teach #rstats? Do your students complain about how lame and old-fashioned dplyr is? Don't worry: I have the solution for you: github.com/hadley/genzp....

genzplyr is dplyr, but bussin fr fr no cap.

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4 months ago
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Featuring a Desertas petrel that stunned scientists by chasing a tropical storm (see their incredible chase mapped here!), tiny nightingales that cross the Sahara twice a year, and Bewick's swans that have changed their stopovers and diet

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5 months ago
Home - ISEC 2027 Call for Workshop Submissions, Deadline Nov 15th -- Submit Workshop Proposal Call for Roundtable Submissions, Deadline Nov 15th -- Submit Roundtable Proposal The International Statistical Ecology Conf...

The next International Statistical Ecology Conference (ISEC) will take place on January 8-15, 2027, in Mérida, México.

Calls for workshop and roundtable proposals now open, deadline Nov 15, 2025 (anywhere on earth).

Visit statisticalecology.org for more information. 🧪

Please share widely 📈🦋🐾

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5 months ago

Variable: e.g. Carrion Crow -ve, Raven +ve, Rook/Hoodie CIs overlap 1.

For the very common stuff, you start to run into detectability effects - particularly in the BirdTrack analysis - where species are likely to be the first-recorded regardless of preference, given how common and obvious they are.

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5 months ago
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Large citizen science datasets are powerful tools for biodiversity science, but they may have biases. Nice new paper from @louisbackstrom.bsky.social et al. showing that for eBird and Birdtrack lists there is a tendency for rare species to be over-represented
onlinelibrary.wiley.com/doi/epdf/10....

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5 months ago

A lot of common species are in that sweet spot. Skylark perhaps closest: 1.001 from the eBird analysis and 0.999 from the BirdTrack analysis. From a quick check through Table S1, other examples inc. Goldeneye, Blue Tit, Goldfinch, Little Egret, Kestrel, Fulmar, Bullfinch, Blackcap.

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5 months ago
Swainson's Thrush perched in a tree at Cuithir, Barra. Photo taken by Louis Backstrom. View over the small patch of woodland where we saw the Swainson's Thrush at Cuithir, Barra.

Brilliant trip to Barra and Colonsay (19th-23rd Sep) with @birdingscot.bsky.social, @louisbackstrom.bsky.social, and James Weeks. Some great birds over the course of the trip, with Stuart Beeby's Swainson's Thrush at Cuithir the undeniable highlight, and a lifer for all of us! 1/4
#BirdingScotland

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5 months ago

In spite of these preferences leading to the overrepresentation of certain species in the eBird & BirdTrack datasets, we found that this bias had limited impacts on actual applications of the data (occupancy models). Even so, we urge consideration of observer bias in analyses of #citizenscience.

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5 months ago

Rare #birds were significantly more likely to drive survey initiation, with other species-specific factors like novelty and charisma also potentially contributing, especially among more common species.

These observer preferences were most prevalent on short-duration surveys (less than 5 min). ⤵️

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5 months ago
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Using #citizenscience data from eBird @cornellbirds.bsky.social and BirdTrack @birdtrack.bsky.social @btobirds.bsky.social, we explore what drives birders to initiate semi-structured surveys on these two large-scale citizen science platforms.

The biggest factor: species rarity! ⤵️

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5 months ago
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Detections of Rare Species Lead Citizen Scientists to Initiate Data Recording Aim Citizen science data are increasingly used to monitor biodiversity but come with several challenges that can impair accurate ecological conclusions. We explore how observers' preferences for cer...

Very pleased to share my first PhD paper, out now in @consbiog.bsky.social:

Backstrom, L. J., Drake, R. L., Worthington, H., & Johnston, A. (2025). Detections of Rare Species Lead Citizen Scientists to Initiate Data Recording. Diversity and Distributions, 31(10), e70103. doi.org/10.1111/ddi.... ⤵️

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