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Andreas Ravache @andreasravache.bsky.social · 15m

🦇A new article from our research team !

🔍This time, we used 3D acoustic tracking of bats to study their behaviour when foraging alone, in presence of conspecifics or heterospecifics.

🎯A very interesing way to explore the optimal foraging theory under different scenarios.

Bat Research Team @bat-cesco.bsky.social · 1d

[NEW PAPER OUT]

🦇 𝗕𝗮𝘁𝘀 𝗮𝗱𝗷𝘂𝘀𝘁 𝘁𝗵𝗲𝗶𝗿 𝗳𝗼𝗿𝗮𝗴𝗶𝗻𝗴 𝗳𝗹𝗶𝗴𝗵𝘁 𝘀𝘁𝗿𝗮𝘁𝗲𝗴𝘆 𝗱𝗲𝗽𝗲𝗻𝗱𝗶𝗻𝗴 𝗼𝗻 𝘄𝗵𝗼 𝘁𝗵𝗲𝘆 𝗳𝗹𝘆 𝘄𝗶𝘁𝗵 !

A deep dive into optimal foraging theory and social foraging through this bat study: flight speed, tolerance to conspecifics, and adjustments in the presence of heterospecifics revealed via 3D tracking.

Foraging flight strategy varies with species identity of co-occurring individuals in bats

The presence of individuals from a different species induces a change in bat's flight strategy, that probably reflects an increase in competitiveness. Inde

academic.oup.com

Reposted by Andreas Ravache

Wilson Ornithological Society @wilsonornithsoc.bsky.social · Jul 28

There's a new guest post on the WOS blog! Riley Lawson describes the backstory of his recent paper in The Wilson Journal of #Ornithology, which documents the underappreciated threat that collisions with anthropogenic structures pose to #seabirds. wilsonsociety.org/2025/07/28/g...

Taxonomic distribution of all banded seabirds that were recorded in the North American Bird Banding Program dataset (1930–2023) as having died from colliding with anthropogenic structures. Recovery rate is defined as the number of collision-associated recoveries per 100,000 birds banded. Bird silhouettes generated by PhyloPic (Keesey 2024).

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Andreas Ravache @andreasravache.bsky.social · Jul 29

[ #Seabirds influence vegetation ]

👩‍🔬 Isotopes & nutrients were compared at an active, abandoned, and control shearwater site
📈 Vegetation & herbivores showed δ¹⁵N enrichment from guano, but soil δ¹⁵N remained unchanged
🏝️Phosphorus and potassium concentraitons suggest that seabirds fertilize soils

Adrift Lab (Marine Science) @adriftlab.bsky.social · Jul 29

⭐#NewPaper alert⭐ Dr Megan Grant's last chapter of her #AdriftLab #PhD thesis focuses on the key role #seabirds play in transporting nutrients from the ocean to their breeding sites (in this case, #LordHoweIsland)

doi.org/10.1002/ece3...

Seabirds Enhance Primary Producer and Consumer Isotope Signals on a Sub‐Tropical Island

Many seabird populations are decline, this means fewer marine-derived nutrients are being deposited on islands. On Lord Howe Island, soil collected from active shearwater colonies contained elevated ....

doi.org

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Reposted by Andreas Ravache

Elina Mäntylä @elinamantyla.bsky.social · Jul 25

Bertram et al. Mercury levels in chicks of a long-lived seabird – parental effects and links with growth and survival www.sciencedirect.com/science/arti... #ornithology #seabirds

Mercury levels in chicks of a long-lived seabird – parental effects and links with growth and survival

Environmental mercury levels continue to rise, leading to increased exposure, especially in long-lived species at high trophic positions, such as many…

www.sciencedirect.com

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Reposted by Andreas Ravache

Elina Mäntylä @elinamantyla.bsky.social · Jul 25

Sanz-Aguilar et al. Rat Odour Does Not Repel European Storm Petrels Hydrobates pelagicus bioone.org/journals/ard... #ornithology #seabirds

Rat Odour Does Not Repel European Storm Petrels Hydrobates pelagicus

Las aves marinas en general, y los petreles en particular, presentan múltiples problemas de conservación. Los depredadores invasores son su principal amenaza en las colonias de cría. Las ratas son los...

bioone.org

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Andreas Ravache @andreasravache.bsky.social · Jul 22

[ 𝑺𝒄𝒊𝒆𝒏𝒄𝒆 𝑼𝒏𝒅𝒆𝒓 𝑷𝒓𝒆𝒔𝒔𝒖𝒓𝒆 ]

🔍 While most researchers report positive interactions that facilitate the transfer of their findings, interactions within the wind energy 💨 and agrochemical sectors 🚜are more often negative ⛔ especially when the research conflicts with political or economic interests 💶

Bat Research Team @bat-cesco.bsky.social · Jul 22

⚠️ Our study published today alerts about the 𝐬𝐭𝐚𝐭𝐞 𝐨𝐟 𝐢𝐧𝐭𝐞𝐫𝐚𝐜𝐭𝐢𝐨𝐧𝐬 𝐛𝐞𝐭𝐰𝐞𝐞𝐧 𝐫𝐞𝐬𝐞𝐚𝐫𝐜𝐡𝐞𝐫𝐬 𝐢𝐧 𝐞𝐜𝐨𝐥𝐨𝐠𝐲 𝐚𝐧𝐝 𝐬𝐨𝐜𝐢𝐨-𝐞𝐜𝐨𝐧𝐨𝐦𝐢𝐜 𝐬𝐭𝐚𝐤𝐞𝐡𝐨𝐥𝐝𝐞𝐫𝐬⚙️
⛔ Negative interactions include greenwashing, manufacture of doubt and abandonment of research topics❗
✅ Solutions are discussed

DOI : 10.1016/j.biocon.2025.111324

Pressured researchers in ecology and conservation demand support to guarantee fair interactions with stakeholders

Facing the current decline of biodiversity, researchers in ecology and conservation interact with socioeconomic stakeholders to involve their research…

www.sciencedirect.com

Reposted by Andreas Ravache

World Seabird Union @worldseabirdunion.bsky.social · Jul 20

To protect wildlife as offshore wind grows, we need the best ecological data. Monash University researchers created a practical guide to seabird flight—how high, how fast & when they fly.

📄 Journal of Applied Ecology: bit.ly/4eXfqQw

#Seabirds #ClimateAndNature

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Andreas Ravache @andreasravache.bsky.social · Jul 18

🍽️𝐀 𝐧𝐨𝐧-𝐢𝐧𝐯𝐚𝐬𝐢𝐯𝐞 𝐦𝐞𝐭𝐡𝐨𝐝 𝐭𝐨 𝐬𝐭𝐮𝐝𝐲 𝐝𝐢𝐞𝐭 !

The authors combined buccal swabbing and metabarcoding to investigate the diet of #Seabirds species. This method appears to be minimally invasive and relatively easy to implement. A complement to approaches based on regurgitates or fecal samples?

Advancing Seabird Diet Studies Through Buccal Swabbing for DNA Metabarcoding

Determining the diet of wide-ranging, pelagic seabirds is challenging. In this study, we investigated buccal swabbing and DNA metabarcoding to describe the diet of Manx shearwaters (Puffinus puffinus...

onlinelibrary.wiley.com

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Andreas Ravache @andreasravache.bsky.social · Jul 17

This kind of descriptive work won’t make the front page of Nature, but it’s essential for protecting lesser-known species.
Science isn’t always flashy, but it matters!

This study, led by @ird-fr.bsky.social and @birdnewcaledonia.bsky.social, will provide essential information for their conservation

Andreas Ravache @andreasravache.bsky.social · Jul 17

But the species is in trouble:
🛠️ Habitat loss from mining
🐀 Predation by rats & cats
🎣 Bycatch risk due to scavenging behavior
Our study shows breeding success drops where predators are present.

Tahiti Petrel Pseudobulweria rostrata population decline at a nickel-mining site: a critical need for adapted conservation strategies | Bird Conservation International | Cambridge Core

Tahiti Petrel Pseudobulweria rostrata population decline at a nickel-mining site: a critical need for adapted conservation strategies - Volume 32 Issue 2

www.cambridge.org

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Andreas Ravache @andreasravache.bsky.social · Jul 17

🥚Once mature, they return to their birthplace to lay a single egg in a burrow.
Unlike most other species, they breed year-round, reducing interspecific competition.
Both parents take turns going to sea, traveling thousands of kilometers to bring food back to their chick.

Behavioral and trophic segregations help the Tahiti petrel to cope with the abundance of wedge-tailed shearwater when foraging in oligotrophic tropical waters - Scientific Reports

Scientific Reports - Behavioral and trophic segregations help the Tahiti petrel to cope with the abundance of wedge-tailed shearwater when foraging in oligotrophic tropical waters

www.nature.com

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Andreas Ravache @andreasravache.bsky.social · Jul 17

🔍 During my PhD in New Caledonia, we surveyed dozens of islets and hiked into remote mountain forests to find the burrows where they nested 🏝️⛰️ searching for a needle in a haystack!
🎊But we eventually found what may be the largest known colony of this species. A major step for its conservation !

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Andreas Ravache @andreasravache.bsky.social · Jul 17

🎉New paper out! My first as last author

🔗http://www.marineornithology.org/PDF/53_1/53_1_1-11.pdf

🧵 Let me walk you through years of research on a rare, elusive & endangered #Seabirds : the Tahiti petrel
A story of exploration, discovery, and challenges in conservation science👇

📷Hadoram Shirihai

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Andreas Ravache @andreasravache.bsky.social · Jul 17

🍽️🐦 Proteomic studies reveals that #Seabirds with plastic in their stomachs had signs of neurodegenerative disease, kidney and liver disease as well as damage to the lining of the stomach

☠️While not always lethal, microplastics will undoubtedly have long-term effects on populations.

Seabirds in crisis: Plastic ingestion induces proteomic signatures of multiorgan failure and neurodegeneration

Plastic consumption in seabirds causes blood signatures of widespread organ damage including brain, stomach, kidney, and liver.

www.science.org

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Andreas Ravache @andreasravache.bsky.social · Jul 8

Very beautiful graphs and impressive results!
As you partially explain the changes in body mass by an increase in insect abundance, could the absence of a long-term relationship be due to a lack of correlation between temperature and insect abundance over the long term?

Andreas Ravache @andreasravache.bsky.social · Jul 4

🌏Back in 2023, Bethany Clark and her collaborators combined telemtry data and plastic density estimates to estimate marine plastic exposure risk for oceaninc seabirds worldwide.
🔗Find out more here : www.nature.com/articles/s41...

Global assessment of marine plastic exposure risk for oceanic birds - Nature Communications

Petrels are wide-ranging, highly threatened seabirds that often ingest plastic. This study used tracking data for 7,137 petrels of 77 species to map global exposure risk and compare regions, species, ...

www.nature.com

Andreas Ravache @andreasravache.bsky.social · Jul 4

Two colleagues recently published a paper on the ecology of the great auk, based on a 300-year-old unpublished manuscript! You can find out more here:
www.euppublishing.com/doi/abs/10.3...

An account of the natural history and exploitation of the great auk (Pinguinus impennis) in ‘Histoire des pesches’, an illustrated eighteenth-century manuscript | Archives of Natural History

The hunting of the great auk (Pinguinus impennis), which led to its extinction in the mid-nineteenth century, is well documented. However, the discovery of archives providing new details on this speci...

www.euppublishing.com

Andreas Ravache @andreasravache.bsky.social · Jul 4

Two colleagues recently published a paper on the ecology of the great auk, based on a 300-year-old unpublished manuscript! You can find out more here:
www.euppublishing.com/doi/abs/10.3...

An account of the natural history and exploitation of the great auk (Pinguinus impennis) in ‘Histoire des pesches’, an illustrated eighteenth-century manuscript | Archives of Natural History

The hunting of the great auk (Pinguinus impennis), which led to its extinction in the mid-nineteenth century, is well documented. However, the discovery of archives providing new details on this speci...

www.euppublishing.com

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Reposted by Andreas Ravache

Kogo Shuko @kogoshuko.bsky.social · Jun 24

Common Murres sitting on a rock covered in, well... common murre poop. #birds #newfoundland #seabirds

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Andreas Ravache @andreasravache.bsky.social · Jun 12

[𝑪𝒐𝒏𝒇𝒆𝒓𝒆𝒏𝒄𝒆]

Thrilled to share the first results of our APOCOPE project at the Renewable Energy & Biodiversity conference in Paris!

A great opportunity to highlight our work on wind farms and wildlife. 🌬️🦇🌿

Bat Research Team @bat-cesco.bsky.social · Jun 12

[𝑅𝑒𝑛𝑒𝑤𝑎𝑏𝑙𝑒 𝐸𝑛𝑒𝑟𝑔𝑦 𝑂𝑏𝑠𝑒𝑟𝑣𝑎𝑡𝑜𝑟𝑦 𝑀𝑒𝑒𝑡𝑖𝑛𝑔𝑠 - 𝑃𝑎𝑟𝑖𝑠]

@andreasravache.bsky.social investigated 𝗳𝗮𝗰𝘁𝗼𝗿𝘀 𝗶𝗻𝗳𝗹𝘂𝗲𝗻𝗰𝗶𝗻𝗴 𝗯𝗮𝘁 𝗺𝗼𝗿𝘁𝗮𝗹𝗶𝘁𝘆 at wind farms 🦇

💀↗️ near forests or wetlands 🌳💧
💀↗️ with low turbine ground clearance
💀↘️ with turbine age⌛
🛑 Curtailment measures ↘️ but do not eliminate mortality

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Andreas Ravache @andreasravache.bsky.social · Jun 11

❗[OUT OF THE PRESS]❗

The authors collected distribution data from 57 seabird taxa, revealing seabird hotspots outside the existing ecological network 🐦🌐

Both methods and results worth a look !

#seabirds #conservation #marinebiology

www.sciencedirect.com/science/arti...

Mismatches between the current marine Natura 2000 network and seabird distributions call for enhanced protected areas off metropolitan France

Seabirds are among the most threatened vertebrates, under pressure from fisheries bycatch, climate change, overfishing, and human disturbance. In Fran…

www.sciencedirect.com

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Reposted by Andreas Ravache

Bat Research Team @bat-cesco.bsky.social · May 14

🦇 Greater sac-winged bat pups acquire their vocal repertoire through a conspicuous vocal practice behavior reminiscent of babbling in human infants. Pups spend about 30% of their daily activity time babbling – and it turns out that mothers influence this behavior.

elifesciences.org/articles/99474

Maternal behavior influences vocal practice and learning processes in the greater sac-winged bat

Non-tutorial feedback shapes song acquisition in a mammalian vocal learner.

elifesciences.org

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Andreas Ravache @andreasravache.bsky.social · May 16

🦇 Using acoustic activity to redict bat fatalities at wind farm could help to identify at-risk areas for bats, and to implement effective curtailment measures ❗

#bats #conservation #bioacoustics

Bat Research Team @bat-cesco.bsky.social · May 16

[𝑅𝑒𝑛𝑒𝑤𝑎𝑏𝑙𝑒 𝐸𝑛𝑒𝑟𝑔𝑦 𝑂𝑏𝑠𝑒𝑟𝑣𝑎𝑡𝑜𝑟𝑦 𝑀𝑒𝑒𝑡𝑖𝑛𝑔𝑠 - 𝑃𝑎𝑟𝑖𝑠]

@elisesvlt.bsky.social identified a positive relationship between the acoustic activity of bats at wind turbine nacelle height and the number of fatalities 🦇

Further studies will aim to identify risk behaviors allowing to predict mortality.

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Reposted by Andreas Ravache

Bat Research Team @bat-cesco.bsky.social · May 6

❗[Job Opportunity]❗

🦇 Sampling and banking of chiropteran acoustic data on the coast and at sea
📍 Concarneau, Brittany, FRANCE
📆 3 months, starting in June
📧 [email protected]

partage.mnhn.fr

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Andreas Ravache @andreasravache.bsky.social · May 6

‼️[NEW PAPER]‼️

Our team's latest paper explores the breeding biology of a little-known and threatened Procellariid species: the Tahiti Petrel. The marked decline in reproductive success in the presence of predators highlights the species' high sensitivity to disturbance and predation.

#seabirds

Marine Ornithology

www.marineornithology.org

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