Chris Roy
@howmanyducks.bsky.social
waterfowl, birds in general, wildlife monitoring, population trends & trajectories, catch & cook in my spare time. Opinions are my own. Retweets are not endorsements.
Reposted by Chris Roy
How many #birds are killed by #cats in Canada? Between 19-197 million! This is the main result from my first chapter of my PhD thesis just published in Avian Conservation and Ecology. ace-eco.org/vol20/iss2/a...
@gowelizabeth.bsky.social
@ryannorrissci.bsky.social
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@gowelizabeth.bsky.social
@ryannorrissci.bsky.social
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October 16, 2025 at 4:19 PM
How many #birds are killed by #cats in Canada? Between 19-197 million! This is the main result from my first chapter of my PhD thesis just published in Avian Conservation and Ecology. ace-eco.org/vol20/iss2/a...
@gowelizabeth.bsky.social
@ryannorrissci.bsky.social
1/6
@gowelizabeth.bsky.social
@ryannorrissci.bsky.social
1/6
Reposted by Chris Roy
Our team has published a new study in Avian Conservation Ecology showing that #cats kill between 19–197 million #birds each year in Canada!
In the time it has taken you to read ~3 posts (1 min) 114 birds have been killed at the paws of cats in Canada.
ace-eco.org/vol20/iss2/a...
1/4
In the time it has taken you to read ~3 posts (1 min) 114 birds have been killed at the paws of cats in Canada.
ace-eco.org/vol20/iss2/a...
1/4
October 16, 2025 at 12:53 AM
Our team has published a new study in Avian Conservation Ecology showing that #cats kill between 19–197 million #birds each year in Canada!
In the time it has taken you to read ~3 posts (1 min) 114 birds have been killed at the paws of cats in Canada.
ace-eco.org/vol20/iss2/a...
1/4
In the time it has taken you to read ~3 posts (1 min) 114 birds have been killed at the paws of cats in Canada.
ace-eco.org/vol20/iss2/a...
1/4
Reposted by Chris Roy
I started reporting and writing this story in May 2024, then had a baby, then reported more to learn project updates, and FINALLY our story is live! Check it out to learn more about the decline of a common species, and an ambitious project trying to understand why.
www.audubon.org/magazine/sol...
www.audubon.org/magazine/sol...
To Solve the Mallard's Mysterious Decline, Researchers Turn to Hi-Tech Trackers
Biologists are using the devices to better understand the bird's behavior and, ultimately, what might be driving our most common duck's population drop.
www.audubon.org
June 25, 2025 at 5:02 PM
I started reporting and writing this story in May 2024, then had a baby, then reported more to learn project updates, and FINALLY our story is live! Check it out to learn more about the decline of a common species, and an ambitious project trying to understand why.
www.audubon.org/magazine/sol...
www.audubon.org/magazine/sol...
Reposted by Chris Roy
We’re recruiting for a multi-university (and ECCC) cross-city project on urban biodiversity, connectivity, and ecosystem services: 1) a Concordia or U Laval MSc student (PhD possible), 2) a UBC MSc student, 3) a postdoc.
I’ll link to each position below. Please share broadly!
I’ll link to each position below. Please share broadly!
August 16, 2025 at 8:16 PM
We’re recruiting for a multi-university (and ECCC) cross-city project on urban biodiversity, connectivity, and ecosystem services: 1) a Concordia or U Laval MSc student (PhD possible), 2) a UBC MSc student, 3) a postdoc.
I’ll link to each position below. Please share broadly!
I’ll link to each position below. Please share broadly!
Reposted by Chris Roy
The #Arctic might be a cold place, but microclimates can get HOT! The cliffs where murres nest can get to a whopping 46.5°C in the full sun.
New work by MSc student Frederique Tremblay, @emilyschoy.bsky.social, @tattersallg.bsky.social & many others available free:
doi.org/10.1016/j.cb...
New work by MSc student Frederique Tremblay, @emilyschoy.bsky.social, @tattersallg.bsky.social & many others available free:
doi.org/10.1016/j.cb...
May 28, 2025 at 1:04 PM
The #Arctic might be a cold place, but microclimates can get HOT! The cliffs where murres nest can get to a whopping 46.5°C in the full sun.
New work by MSc student Frederique Tremblay, @emilyschoy.bsky.social, @tattersallg.bsky.social & many others available free:
doi.org/10.1016/j.cb...
New work by MSc student Frederique Tremblay, @emilyschoy.bsky.social, @tattersallg.bsky.social & many others available free:
doi.org/10.1016/j.cb...
Reposted by Chris Roy
Reposted by Chris Roy
www.tandfonline.com/doi/full/10....
Our own Riley Lawson led this work to study #seabird #collisions using long-term data from the #USGS #BirdBandingLaboratory.
Yep, seabirds hit #windows, too.
#ornithology @wilsonornithsoc.bsky.social #BirdWindowCollisions
#OKState #NREM
Our own Riley Lawson led this work to study #seabird #collisions using long-term data from the #USGS #BirdBandingLaboratory.
Yep, seabirds hit #windows, too.
#ornithology @wilsonornithsoc.bsky.social #BirdWindowCollisions
#OKState #NREM
Band recovery data illustrate spatiotemporal and taxonomic patterns of seabird collisions with anthropogenic structures
Seabird populations are declining rapidly due to numerous anthropogenic threats, including habitat destruction, invasive species, longline fisheries bycatch, and plastic ingestion. However, few stu...
www.tandfonline.com
April 3, 2025 at 9:12 PM
www.tandfonline.com/doi/full/10....
Our own Riley Lawson led this work to study #seabird #collisions using long-term data from the #USGS #BirdBandingLaboratory.
Yep, seabirds hit #windows, too.
#ornithology @wilsonornithsoc.bsky.social #BirdWindowCollisions
#OKState #NREM
Our own Riley Lawson led this work to study #seabird #collisions using long-term data from the #USGS #BirdBandingLaboratory.
Yep, seabirds hit #windows, too.
#ornithology @wilsonornithsoc.bsky.social #BirdWindowCollisions
#OKState #NREM
Reposted by Chris Roy
new publication by our team member @thiemokarwinkel.bsky.social about the multi-year and multi site tracking of long-tailed ducks (Clangula hyemalis) from the Arctic to the Baltic Sea. @ifv-whv.bsky.social read here open access: onlinelibrary.wiley.com/doi/10.1002/...
April 2, 2025 at 4:36 PM
new publication by our team member @thiemokarwinkel.bsky.social about the multi-year and multi site tracking of long-tailed ducks (Clangula hyemalis) from the Arctic to the Baltic Sea. @ifv-whv.bsky.social read here open access: onlinelibrary.wiley.com/doi/10.1002/...
Reposted by Chris Roy
🦆 If ya like hearing about ducks (and/or genetics) I'm giving a public seminar with @amornith.bsky.social on them next Monday (3/31) at noon! You can sign up here: americanornithology-org.zoom.us/webinar/regi...
March 26, 2025 at 7:14 PM
🦆 If ya like hearing about ducks (and/or genetics) I'm giving a public seminar with @amornith.bsky.social on them next Monday (3/31) at noon! You can sign up here: americanornithology-org.zoom.us/webinar/regi...
Reposted by Chris Roy
Excited to see this literature review of coastal bird stewardship & management strategies w/ a focus on the Gulf published in JFO. This was Jennifer Fuller's first first-authored paper, & we worked with an amazing team of scientists to prepare & publish this work! journal.afonet.org/vol96/iss1/a...
Journal of Field Ornithology: Effectiveness of stewardship and management strategies to conserve coastal bird populations in the northern Gulf of Mexico: a literature review
Shorebirds, seabirds, and wading birds (hereafter coastal birds) have experienced considerable losses over the last century and require proactive conservation management to stabilize or grow populatio...
journal.afonet.org
March 27, 2025 at 6:29 PM
Excited to see this literature review of coastal bird stewardship & management strategies w/ a focus on the Gulf published in JFO. This was Jennifer Fuller's first first-authored paper, & we worked with an amazing team of scientists to prepare & publish this work! journal.afonet.org/vol96/iss1/a...
Reposted by Chris Roy
Do you study the impacts #cats have on #birds? Myself and @gowelizabeth.bsky.social are organizing a symposium on the impacts of cats on birds in Canada! We have a number of invited talks, but consider submitting an abstract for our #SCO-SOC symposium if you'd like to join us! See you in Saskatoon!
Abstract submission is live!
Abstracts are due by March 31.
Decisions will be sent out by April 30.
La soumission des résumés est ouverte!
Les résumés doivent être soumis au plus tard le 31 mars.
Les décisions seront annoncées au plus tard le 30 avril.
#ornithologie
#ornithology
#birdsofcanada
Abstracts are due by March 31.
Decisions will be sent out by April 30.
La soumission des résumés est ouverte!
Les résumés doivent être soumis au plus tard le 31 mars.
Les décisions seront annoncées au plus tard le 30 avril.
#ornithologie
#ornithology
#birdsofcanada
March 18, 2025 at 3:18 PM
Do you study the impacts #cats have on #birds? Myself and @gowelizabeth.bsky.social are organizing a symposium on the impacts of cats on birds in Canada! We have a number of invited talks, but consider submitting an abstract for our #SCO-SOC symposium if you'd like to join us! See you in Saskatoon!
New paper: We used the woodcock Singing-Ground Survey (SGS) data in Canada from 2000-2019, and we found American woodcock occurrence and abundance were most influenced by habitat within a 310m radius. tinyurl.com/3ttuv4w4
March 18, 2025 at 2:12 PM
New paper: We used the woodcock Singing-Ground Survey (SGS) data in Canada from 2000-2019, and we found American woodcock occurrence and abundance were most influenced by habitat within a 310m radius. tinyurl.com/3ttuv4w4
Reposted by Chris Roy
The 2025 U.S. #StateOfTheBirds report was released today. The report finds that birds continue to decline unabated across most habitats—habitats that are also vital to human well-being.
Read the report & take action! www.stateofthebirds.org/2025/
#bringbirdsback
Read the report & take action! www.stateofthebirds.org/2025/
#bringbirdsback
March 13, 2025 at 6:48 PM
The 2025 U.S. #StateOfTheBirds report was released today. The report finds that birds continue to decline unabated across most habitats—habitats that are also vital to human well-being.
Read the report & take action! www.stateofthebirds.org/2025/
#bringbirdsback
Read the report & take action! www.stateofthebirds.org/2025/
#bringbirdsback
Reposted by Chris Roy
New paper out! We looked at the effect of the probability of encountering conspecifics on the foraging behaviours of territorial and non territorial Arctic foxes.
with @dominiqueberteaux.bsky.social @fredericddb.bsky.social and Marie-Pier Poulin
onlinelibrary.wiley.com/doi/10.1002/...
with @dominiqueberteaux.bsky.social @fredericddb.bsky.social and Marie-Pier Poulin
onlinelibrary.wiley.com/doi/10.1002/...
Territoriality Modulates the Effect of Conspecific Encounters on the Foraging Behaviours of a Mammalian Predator
We monitored the movements and behaviours of Arctic foxes using neighbouring home ranges and evaluated if conspecific interactions influenced where they foraged. The probability of encountering consp...
onlinelibrary.wiley.com
March 10, 2025 at 2:09 PM
New paper out! We looked at the effect of the probability of encountering conspecifics on the foraging behaviours of territorial and non territorial Arctic foxes.
with @dominiqueberteaux.bsky.social @fredericddb.bsky.social and Marie-Pier Poulin
onlinelibrary.wiley.com/doi/10.1002/...
with @dominiqueberteaux.bsky.social @fredericddb.bsky.social and Marie-Pier Poulin
onlinelibrary.wiley.com/doi/10.1002/...
Reposted by Chris Roy
📣PhD opportunity!
We are looking for a candidate to develop a project on the spatial ecology of #waterbirds using rice fields. Check for the complete details below, and get in touch until the 21st of March!
drive.google.com/file/d/1R8MI...
#ornithology #movement #tracking #connectivity
We are looking for a candidate to develop a project on the spatial ecology of #waterbirds using rice fields. Check for the complete details below, and get in touch until the 21st of March!
drive.google.com/file/d/1R8MI...
#ornithology #movement #tracking #connectivity
March 10, 2025 at 12:10 PM
📣PhD opportunity!
We are looking for a candidate to develop a project on the spatial ecology of #waterbirds using rice fields. Check for the complete details below, and get in touch until the 21st of March!
drive.google.com/file/d/1R8MI...
#ornithology #movement #tracking #connectivity
We are looking for a candidate to develop a project on the spatial ecology of #waterbirds using rice fields. Check for the complete details below, and get in touch until the 21st of March!
drive.google.com/file/d/1R8MI...
#ornithology #movement #tracking #connectivity
Reposted by Chris Roy
You might our recent paper "VMC: A Grammar for Visualizing Statistical Model Checks" interesting arxiv.org/abs/2408.16702
VMC: A Grammar for Visualizing Statistical Model Checks
Visualizations play a critical role in validating and improving statistical models. However, the design space of model check visualizations is not well understood, making it difficult for authors to e...
arxiv.org
March 4, 2025 at 5:03 PM
You might our recent paper "VMC: A Grammar for Visualizing Statistical Model Checks" interesting arxiv.org/abs/2408.16702
Reposted by Chris Roy
Recently published research indicating that National Wildlife Refuges embedded in an agricultural matrix may not be a refuge from pesticide contamination 🧪 kwnsfk27.r.eu-west-1.awstrack.me/L0/https:%2F...
kwnsfk27.r.eu-west-1.awstrack.me
March 4, 2025 at 7:43 PM
Recently published research indicating that National Wildlife Refuges embedded in an agricultural matrix may not be a refuge from pesticide contamination 🧪 kwnsfk27.r.eu-west-1.awstrack.me/L0/https:%2F...
Reposted by Chris Roy
Our common garden experiment with urban and forest great tits is out early view in Evolution! doi.org/10.1093/evol... @denisreale.bsky.social @annecharmantier.bsky.social
February 25, 2025 at 11:11 AM
Our common garden experiment with urban and forest great tits is out early view in Evolution! doi.org/10.1093/evol... @denisreale.bsky.social @annecharmantier.bsky.social
Reposted by Chris Roy
🪶 Today, more than 1/3 of the federal grant $$ we were relying on to finance our science & conservation work in 2025 is paused w/ no indication of when, or if, we will be able to access it again. Your tax-deductible donation helps us weather this period of uncertainty. birdpop.org/pages/do... 1/2
February 24, 2025 at 10:21 PM
🪶 Today, more than 1/3 of the federal grant $$ we were relying on to finance our science & conservation work in 2025 is paused w/ no indication of when, or if, we will be able to access it again. Your tax-deductible donation helps us weather this period of uncertainty. birdpop.org/pages/do... 1/2
Reposted by Chris Roy
📢 Job Posting with Bird Protection Quebec 🦅
#ornithology #birding #conservation
🔗 Info here: lc.cx/qTG9C7
📸 Picture below: Barrow's Goldeneye (Garrot d'Islande) – taken close to home!
#ornithology #birding #conservation
🔗 Info here: lc.cx/qTG9C7
📸 Picture below: Barrow's Goldeneye (Garrot d'Islande) – taken close to home!
February 20, 2025 at 5:59 PM
📢 Job Posting with Bird Protection Quebec 🦅
#ornithology #birding #conservation
🔗 Info here: lc.cx/qTG9C7
📸 Picture below: Barrow's Goldeneye (Garrot d'Islande) – taken close to home!
#ornithology #birding #conservation
🔗 Info here: lc.cx/qTG9C7
📸 Picture below: Barrow's Goldeneye (Garrot d'Islande) – taken close to home!
Reposted by Chris Roy
Help our Flocks Project take flight! We all need a space to feel we belong & are supported. This is what our Flocks Project—our joint effort with Wilson Ornithological Society & Association of Field Ornithologists—aims to do for ornithologists. Donate today!
www.gofundme.com/f/flocks-for...
www.gofundme.com/f/flocks-for...
February 18, 2025 at 9:14 PM
Help our Flocks Project take flight! We all need a space to feel we belong & are supported. This is what our Flocks Project—our joint effort with Wilson Ornithological Society & Association of Field Ornithologists—aims to do for ornithologists. Donate today!
www.gofundme.com/f/flocks-for...
www.gofundme.com/f/flocks-for...
Reposted by Chris Roy
Come work with us! We're hiring a Senior Manager, Quantitative Science on National Audubon Society's Science Team (1/2)
audubon.wd5.myworkdayjobs.com/en-US/Audubo...
audubon.wd5.myworkdayjobs.com/en-US/Audubo...
Senior Manager, Quantitative Science
Position Summary: The Senior Manager, Quantitative Science will be responsible for leading and executing analyses that measure the biological impacts of Audubon's initiatives. This will include develo...
audubon.wd5.myworkdayjobs.com
February 18, 2025 at 11:31 PM
Come work with us! We're hiring a Senior Manager, Quantitative Science on National Audubon Society's Science Team (1/2)
audubon.wd5.myworkdayjobs.com/en-US/Audubo...
audubon.wd5.myworkdayjobs.com/en-US/Audubo...
Reposted by Chris Roy
In Feb 23 we undertook a census of the UK naturalised Barnacle Goose population. The aim to produce an updated population estimate & report on winter distribution. Results have now been published in @britishbirds.bsky.social, with our thinking on future monitoring needs #Ornithology 1/7 ⬇️
February 17, 2025 at 10:09 AM
In Feb 23 we undertook a census of the UK naturalised Barnacle Goose population. The aim to produce an updated population estimate & report on winter distribution. Results have now been published in @britishbirds.bsky.social, with our thinking on future monitoring needs #Ornithology 1/7 ⬇️
Reposted by Chris Roy
naturecounts.ca/nc/socb-epoc... In case you missed it last Fall when this was released. I'd never posted it here before. Super informative: pick your fave species and see how it has been trending.
The State of Canada’s Birds Report
Canada’s birds have stories to tell. See how they are doing, how their populations have changed, and what you can do to help.
naturecounts.ca
January 27, 2025 at 12:03 AM
naturecounts.ca/nc/socb-epoc... In case you missed it last Fall when this was released. I'd never posted it here before. Super informative: pick your fave species and see how it has been trending.