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Romain Lorrilliere

@romain-lorrilliere

Research Engineer at @CNRS in CRBPO, the French ringing scheme Bird ringing, bird migration, CES, citizen science https://crbpo.mnhn.fr/

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26.11.2024
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Latest posts by Romain Lorrilliere @romain-lorrilliere

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Acceleration hotspots of North American birds’ decline are associated with agriculture Human activities might have accelerated declines of population abundance, but this acceleration remains underexplored. Using 1033 North American Breeding Bird Survey routes, we analyze abundance chang...

Thrilled to share our new paper out in @science.org, led by François Leroy and Petr Keil! Using the Breeding Bird Survey, we document not only a continent-wide decline in bird abundance since the 1980s — but, crucially, the acceleration of these declines over time. www.science.org/doi/10.1126/...

26.02.2026 20:29 👍 92 🔁 58 💬 5 📌 1
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Common birds have higher abundances in croplands with lower pesticide purchases Abstract. Field studies on pesticide impacts often lack detailed use data, struggle to disentangle their effects from agricultural intensification, and ove

New study finds widespread negative impact of pesticides, extending beyond farmland specialists to common bird species foraging in croplands, with potential cascading effects within and outside these landscapes

#pesticides
#biodiversity
#birds

royalsocietypublishing.org/rspb/article...

18.01.2026 09:16 👍 7 🔁 4 💬 0 📌 0
IMAGE SHOWS GRAPHIC OF CORNELL LAB OF ORNITHOLOGY PHYLOGENY EXPLORER TOOL.

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...

27.01.2026 01:26 👍 410 🔁 168 💬 8 📌 31
A climate-mediated ecological cascade leads to salmonellosis outbreaks in the United States. Temperature differences in successive summers are associated with differences in tree cone production in high-elevation and high-latitude forests (Top row), such that a warm summer followed by a cold summer is associated with a drop in cone production the following year (Top Right panel). Cone production is negatively associated with facultative bird migrations (irruptions) of eight seed-eating species (Middle row), such that when cone numbers are low, birds are more likely to irrupt in large numbers (Middle row, Right panel). When irruptions of pine siskins (S. pinus) occur, more songbirds are often found infected with, or dead from, salmonellosis (Bottom Right panel).

A climate-mediated ecological cascade leads to salmonellosis outbreaks in the United States. Temperature differences in successive summers are associated with differences in tree cone production in high-elevation and high-latitude forests (Top row), such that a warm summer followed by a cold summer is associated with a drop in cone production the following year (Top Right panel). Cone production is negatively associated with facultative bird migrations (irruptions) of eight seed-eating species (Middle row), such that when cone numbers are low, birds are more likely to irrupt in large numbers (Middle row, Right panel). When irruptions of pine siskins (S. pinus) occur, more songbirds are often found infected with, or dead from, salmonellosis (Bottom Right panel).

New paper links Salmonellosis disease dynamics to avian irruptions mediated by transmission at bird feeders - with subsequent spillover to humans causing severe illness and death 🪶🌎 #ornithology #UKBirding
www.pnas.org/doi/10.1073/... #BirdFeeding #Rethink @mwtingley.bsky.social

21.01.2026 09:44 👍 43 🔁 28 💬 1 📌 2

Les plantes structurent les agro-écosystèmes et la façon dont on les cultive impacte d’autres espèces.

Ainsi, une étude publiée par des scientifiques du MNHN et de @univpoitiers.bsky.social démontre un lien entre l’achat de pesticides et la raréfaction des oiseaux.
doi.org/10.1098/rspb...

27.01.2026 14:13 👍 4 🔁 4 💬 1 📌 1
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Have you ever seen a pink grasshopper? A genetic mutation called erythrism (the overproduction of red pigment) leaves some individuals looking pretty in pink! Their vivid coloring makes hiding from predators much more difficult.
American Museum of Natural History
@AMNH #globalmuseum #insects

22.01.2026 16:51 👍 14 🔁 8 💬 1 📌 4

Tracking #waders/#shorebirds - where are the knowldege gaps?
See Martin's new paper:
conbio.onlinelibrary.wiley.com/doi/10.1111/...
BLOG
What are we learning from tracking?
wadertales.wordpress.com/2025/05/06/m...
Map illustrating Whimbrel tracks 👇
#ornithology

16.01.2026 06:44 👍 30 🔁 13 💬 0 📌 0

Look at her go!
#invertebrates 🌿

08.10.2025 01:07 👍 1355 🔁 325 💬 38 📌 40
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One of the Funniest Documentaries of the Year Is Streaming for Free on YouTube Listers is a journey into the dark and cringy heart of one of the world’s most peculiar hobbies.

I wrote about the Reiser brothers and their hilarious, disgusting Listers documentary for Slate:

slate.com/culture/2025...

15.09.2025 17:29 👍 138 🔁 33 💬 7 📌 38

📢 La plateforme du MNHN est ouvert pour candidater au poste recrute de chargé de mission pour animer le Réseau Bécasse au CRBPO

📅 Date limite de candidature 27-06-2025

recrutement.mnhn.fr/front-jobs-d...

29.05.2025 08:00 👍 3 🔁 2 💬 0 📌 0
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📢 Dans le cadre d’un nouveau partenariat @ofbiodiversite.bsky.social - @mnhn.fr -acteur cynégétique, le CRBPO recherche un·e chargé·e de mission (catégorie A, CDD 3 ans renouvelable) pour coordonner et valoriser le Réseau Bécasse (400 bagueur·ses)
crbpo.mnhn.fr/actualites/o...

19.05.2025 21:41 👍 3 🔁 4 💬 0 📌 1
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Impacts des modes de production labellisés sur la biodiversité : résultats de l’étude INRAE–Ifremer COMMUNIQUÉ DE PRESSE - Permettre aux consommateurs de connaître l’impact environnemental de leurs achats est l’un des objectifs de la loi Climat et résilience de 2021 . C’est dans ce cadre qu’ont été ...

L’analyse des cahiers des charges atteste de l’effet positif des labels d’agriculture biologique sur la biodiversité car ce sont ceux qui intègrent le plus de pratiques identifiées comme favorables, de manière exigeante et ambitieuse www.inrae.fr/actualites/i...

01.05.2025 21:52 👍 7 🔁 10 💬 0 📌 0
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Trends of alpine birds in Europe are different in the regions - Anna Gamero presenting new alpine bird index at #BirdNumbers2025.

01.04.2025 08:02 👍 15 🔁 5 💬 0 📌 0
EBCC board members watching a White-tailed Eagle fly past their meeting room in Riga

EBCC board members watching a White-tailed Eagle fly past their meeting room in Riga

What happens when a White-tailed Eagle flies past the window of a European Bird Census Council board meeting…

30.03.2025 12:19 👍 97 🔁 10 💬 2 📌 1

Jeudi dernier, j'ai eu la chance d'être invitée à assister à une séance de baguage. Au cœur du Jardin des plantes de Paris se trouve un lieu fermé au public, le jardin écologique, où on réalise depuis une vingtaine d'années un suivi des piafs locaux. Explications : bsky.app/profile/aymo...

27.02.2025 09:19 👍 28 🔁 15 💬 2 📌 0
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Pesticides a major contributor to global biodiversity crisis, says study A comprehensive new study has shown that pesticides are a major contributor to the global biodiversity crisis. The research has highlighted overwhelming negative impacts for more than 800 species of plants, animals, fungi and microbes that they are not intended to harm. It was discovered that chemic...

A comprehensive new study has shown that pesticides are a major contributor to the global biodiversity crisis:

16.02.2025 10:02 👍 25 🔁 15 💬 1 📌 5
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Crossing the Sahara by small jumps: the complete migration of the Western Orphean Warbler Curruca hortensis Journal of Ornithology - We analyzed data retrieved from six multi-sensor loggers deployed on adult Western Orphean Warblers Curruca hortensis in France, to unravel the migration strategy of the...

Crossing the Sahara by small jumps: the complete migration of the Western Orphean Warbler Curruca hortensis | link.springer.com/ar... | Journal of Ornithology | #ornithology 🪶

11.02.2025 16:27 👍 26 🔁 11 💬 0 📌 2
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NEW Decline of European bird populations continues especially birds of farmland. Pan-European Common Bird Monitoring Scheme (PECBMS) presents updated wild bird indices 1980–2023. Data = 168 bird species 30 countries⬇️ @rspb.bsky.social @birdlifeeurope.bsky.social @ec.europa.eu @uclcber.bsky.social 📉🐦

13.12.2024 16:51 👍 36 🔁 19 💬 1 📌 1
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Pet owners accidentally poisoning garden birds.
Our latest research finds pet flea treatments (fipronil and imidacloprid) in 100% of blue tit and great tit nests, with nestling mortality higher in the more contaminated nest. @SongBirdSBS @SussexUni @CannelleTassin

27.01.2025 08:53 👍 441 🔁 298 💬 21 📌 42
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Retrouvez le GMB sur @bsky.app

👉 Le GMB n'est plus actif sur X depuis 2023

👉 Pourquoi le mouvement FNE quitte Twitter : fne.asso.fr/.../depart-d....

👉 En 2025, le GMB va mener un travail pour définir son usage des réseaux sociaux

#helloquittex @fne.asso.fr

20.01.2025 14:20 👍 4 🔁 2 💬 0 📌 1
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Notre vaguelette de froid s'achève :
➡️Aucun record de froid.

Rien d'étonnant : statistiquement, il ne s'est RIEN passé. Malgré la gesticulation de certains. Encore une fois, les chiffres parlent. Une remarque ? Une insulte peut-être ?

Voici les écarts aux normes avec de véritables vagues de froid.

21.01.2025 07:54 👍 689 🔁 182 💬 35 📌 5

Effets négatifs du nourrissage des oiseaux : au Royaume-Uni, la RSPB cesse de vendre des mangeoires au plat en raison notamment de l'épidémie de trichomonose qui sévit depuis 20 ans et qui frappe plus particulièrement les verdiers

08.01.2025 19:25 👍 4 🔁 1 💬 1 📌 0
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« L’Office français de la biodiversité, l’un des principaux remparts contre l’effondrement du vivant, est victime d’attaques intolérables » TRIBUNE. Amputer les missions de l’OFB, en réduire les moyens ou revenir sur ses dotations sacrifierait des ressources indispensables pour sa capacité à protéger la biodiversité et à la défendre face ...

L’Office français de la biodiversité, l’un des principaux remparts contre l’effondrement du vivant, est victime d’attaques intolérables - j'ai signé cette tribune @ofbiodiversite.bsky.social

www.lemonde.fr/idees/articl...

08.01.2025 10:43 👍 235 🔁 122 💬 3 📌 2

PLEASE SHARE From Julien Renoult (not -yet- on Bluesky): Postdoc Opportunity in Montpellier France. 18 months starting May 2025: Generative AI for Studying the Influence of Habitats on the Diversification of Bird Color Patterns. Applications and information here: tinyurl.com/2368teak

20.12.2024 19:37 👍 8 🔁 14 💬 0 📌 0

Par ici pour le récap des threads sur ce qu'est l'étude des oiseaux par la baguage, le CRBPO, le SPOL Mangeoire et le bilan de mes 10 années de suivi des oiseaux à la mangeoire dans mon jardin
🔽🔽🔽

20.12.2024 15:56 👍 9 🔁 5 💬 1 📌 1

l'Office Français Biodiversité recrute #OFB #job #ecologie 🌍🇫🇷
2 postes sont ouverts dans mon service Santé de la Faune & Fonct° des Ecosystèmes Agricoles #SanteAgri au sein de la Direction de la Recherche #DRAS :
1 poste de chef.fe de service adjoint
1 poste de chargé.e de mission recherche
👇

19.12.2024 11:06 👍 1 🔁 5 💬 1 📌 1
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Great start for a new side project focussing on Alpine accentor altitudinal migration!
The project is based on multi-sensor logger deployement (6 birds tagged today out of 8 planned for this year) and is made possible by a small field research grant. @pauldufour80.bsky.social

17.12.2024 19:22 👍 24 🔁 5 💬 3 📌 0
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🦜 Originaire d'Asie, échappée des cargaisons d'Orly dans les années 70, on compte aujourd'hui 8 000 individus en Ile-de-France selon la LPO.
Classée comme “espèce exotique envahissante”, est-elle vraiment une menace pour la biodiversité ?

13.12.2024 14:58 👍 14 🔁 7 💬 1 📌 0
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For my first post here, I’m happy to share our new paper just published in @ibisjournal.bsky.social Thanks to a great team effort, we made a small step forward in the study of Siberian vagrants in Europe and clarified the status of two (pseudo) vagrants: the YBW & the Sib Chiffchaff. Some results 🧵

11.12.2024 13:42 👍 148 🔁 49 💬 3 📌 3