Discover and read the best of Twitter Threads about #ornithology

Most recents (24)

For the return of the #UNMBioblog after our year hiatus, I chose to write about the negative consequences for cats, humans, and #wildlife when we allow #cats to roam freely. I couldn't help myself with the punny title.
unm-bioblog.blogspot.com/2021/09/catast…
I was inspired to write this blog after I witnessed my neighbor's outdoor pet #cat killed a #bird under my feeder. A heated argument ensued. I know nothing has changed because I still scare him out of my backyard. I've counted 9 different cats in my backyard, here is one
I am a paradoxical #catlover, which stems from my #science & #ornithology career. I know how cute it is for my own #cat to frolic in flowers but I understand how dangerous it is for #cats, human #health, & #wildlife when cats roam #CatsOfTwitter #Caturday #catsofinstagram
Read 37 tweets
1ere partie d'un #ThreadPhoto, résumé de notre ballade ce matin avec @petitesarcelle au (quasi) lever du jour dans le parc Paul Mistral à @VilledeGrenoble .
#Thread
⚠️Clic sur les 📸 pour les voir en format réel 😊
#TwitterNatureCommunity #NaturePhotography #nature #Grenoble
C'était une matinée "étournesque". Cet #Etourneau sansonnet ( Sturnus vulgaris) était en train de se laver en barbotant dans l'eau, pas très loin de nous
#Starling #photography #birds #BirdsSeenIn2021
#birdphotography #TeamOrnitho #ornithology Etourneau sansonnet (Common starling) - Sturnus vulgaris
Du coup Cette petite Merlette (#Merle noir ♀ - Turdus merula) s'y est mise aussi, pour notre plaisir =)
#blackbird #photography #birds #BirdsSeenIn2021
#birdphotography #TeamOrnitho #ornithology
Read 22 tweets
Spring Waders 1/12
@BirdTrack tells us that the first Little Ringed Plovers are arriving back in the UK. They are not the only #waders on the move, as you can read here:
wadertales.wordpress.com/2017/07/20/whi…
I'll pull out some highlights in this thread. Image
Spring #waders 2/12
Stone-curlews are arriving too, most having spent the winter in Spain, Portugal, Morocco or Algeria. You can find them on their territories during the day but they will feed elsewhere at night. More here:
wadertales.wordpress.com/2021/02/26/gra…
#ornithology Image
Spring #waders 3/12
Greenshank are on the move. Scottish-breeders have already left English estuaries. Their feeding spots will soon be used by birds that have wintered further south and are heading for Scandinavia:
wadertales.wordpress.com/2020/03/23/mig…
#ornithology Image
Read 8 tweets
Back from Mayfield Park, a mix of wooded, beech-dominated hillsides and seasonally flooded, willow-dominated valley. Here's a thread of things I saw. First of all, active burrow complex. Either badger sett or fox earth, I think badger... ImageImage
The UK needs more thickets, they're really important for small birds, mammals and arthropods, especially in the winter. There are a few good ones in the park, I hope that they persist... ImageImageImage
Robins are abundant, and tame and ready to approach people. I've written about #robins at #TetZoo, here's an article.... web.archive.org/web/2015073017… #passerines #birds #ornithology Image
Read 6 tweets
Daily Bookmarks to GAVNet 11/07/2020 greeneracresvaluenetwork.wordpress.com/2020/11/07/dai…
Scientists work to shed light on Standard Model of particle physics

phys.org/news/2020-11-s…

#light #particle #physics
How US Presidential Elections Are Impacted By Geology

forbes.com/sites/davidbre…

#geology #elections
Read 8 tweets
1.#tropicon Estimating bird diversity in tropical forests is hard. We looked at whether using lots of short surveys (high temporal resolution -HR) is more effective than several long surveys when conducting point-count surveys with autonomous recorders and manual analysis.
2. #tropicon We compared bird species detected by @NargilaMoura analysing 240 x 15 second audio clips (HR) against 4 x 15 minute samples (low res - LR) from 29 Amazonian @RAS_network rainforest sites – both totalling 1 hr of data. Illustrative model below: Image
3.#tropicon We found that HR sampling results in many more species being detected – approximately 50% more species at each site (HR= 66.27±3.77 (SE), LR= 43.37±3.77) and 10% higher gamma diversity! Species were also detected faster using HR sampling. #ornithology #ecoacoustics Image
Read 7 tweets
European Stonechat is a gorgeous bird & an exception among decreasing #FarmlandBirds in Belgium: population increased 4-fold since 2000. Why is #stonechat so successful in man-made landscape?
Paper from RGailly out in #Oecologia @SpringerNature thread #ornithology 📸FCarion 1/10
In our study area, stonechats can choose b/w 3 habitats: clear-cut, grassland & Christmas-tree plantations (CTP) a non-food perennial crop. A previous study shown this crop is offering a higher bird diversity than grassland when hedgerows are scarce. 2/10 sciencedirect.com/science/articl…
But is this a good idea for stonechat to breed in intensive Christmas-tree crop? We compared fitness-related parameters between these 3 anthropogenic habitats. First, ♂️♂️ prefer clear-cut over the 2 other habitats as they are reoccupied earlier after spring migration 3/10
Read 11 tweets
14/21 #ISTC20 #Sesh9
There is much scope in combining Earth observations with Down-to-Earth observations of tracked #shorebirds. We developed a very satisfactory LAND USE INTENSITY metric based on @Sentinel1a explaining godwit distributions. besjournals.onlinelibrary.wiley.com/doi/full/10.11… @ESA_EO @esa
15/21 #ISTC20 #Sesh9
We were able to show the value of both this new LAND USE INTENSITY metric as well as distribution of tagged godwits during hot dry summer of 2018, when much of what is now evergreen pasture turned brown. #climatechange #Dairy @RuthHowison @DairyCampus
16/21 #ISTC20 #Sesh9
Distribution of tagged black-tailed #godwits in early summer was better predictor of #drought damage than land use intensity. Interpretation: #grutto's select intact #soils with capillary connections with #groundwater. #meadowbirds #sentinels @WaderStudy
Read 8 tweets
1/21 #ISTC20 #Sesh9
Hi shorebird folks! 1more4U2go! Migratory shorebirds connect. Movements, presence & phenotypes signal the state of habitats. Let's develop tracked individual migratory birds as sentinels (of connected parts) of Earth. #ornithology #globalchange @WaderStudy
2/21 #ISTC20 #Sesh9
Recently, 100 units of fossil energy produced 104 energy units of food, thanks soil-based processes. Now, 100 units fossil energy yield 16 food units, the 84% loss equals release of CO2 & active nitrogen threatening climate & biodiversity. #globalchange #dairy
3/21 #ISTC20 #Sesh9
Looking at scale of a country then, steep decline of specialized #dairy #farmland #wader, black-tailed #godwit (#grutto) in Netherlands signals growth of unsustainable, climate & biodiversity threatening, practices in agriculture. #globalchange @WaderStudy
Read 14 tweets
1/6 #ISTC20 #Sesh8
Knowing where (how high) birds fly in the air is important in this changing world. Because we have windfarms, airplanes, and tall buildings, all of which have the potential to impact the flight altitude of avian migrants. #ornithology #ClimateChange
2/6 #ISTC20 #Sesh8
R.Q: What are the important drivers for flight altitude selection of avian migrants?

Studies (radar) suggest migrants select flight altitude to maximise wind support. However, a few have taken a quantitative approach. So, we tested these 4 hypothesis:
3/6 #ISTC20 #Sesh8
To test these hypotheses we used the GSM-GPS tracking data of far eastern curlew and whimbrel.

We compared weather conditions of altitude bins at which birds migrated with other altitude bins that birds did not choose to migrate, using 'coxph' model.
Read 6 tweets
1 #ISTC20 #Sesh7 OK here’s a thread on #languagebarriers. Yes you are in the right conference. This is still about shorebirds. What I mean is I will explain how language barriers can affect the conservation of shorebirds (or any other species). So don’t leave! #ornithology
#ISTC20 #Sesh7 I will also tweet the same content in Japanese during the break after Session 7. Sadly I am not fluent enough to tweet in other languages, but feel free to translate my tweets into any language! セッション7後の休憩時間中に日本語でもツイートしますのでご覧ください。
2 #ISTC20 #Sesh7 So, why languages? Shorebirds’ incredible migration (image: @GlobalFlyway) means their annual cycles span across multiple countries, and this poses a challenge to conservation, as we need to coordinate across countries, where the language is often different.
Read 26 tweets
1/23 Thanks first to organizers of this new age conference, for inviting me to join in. I am very excited to be here with shorebird researchers from around the Twitter and real worlds #ISTC20 #SESH3 #ornithology #Waders
2/25 My tweets will explore the effects of extreme weather events on the demography of a small sub-arctic breeding shorebird: Semipalmated Plover (Charadrius semipalmatus) #ISTC20 #SESH3
3/23 Much attention of climate research and birds has been on warming: mismatching phenology in particular. But we know extreme weather can have a major impact on pop’n. Deaths of these songbirds probably due to recent fires and drought in western USA #ISTC20 #SESH3
Read 23 tweets
1 #ISTC20 #Sesh2 Hi everyone! Migratory ranges emerge from individual journeys between breeding and winter sites each year. Tracking these individual journeys in space and time can help us understand how migratory ranges form and change wadertales.wordpress.com/2019/07/29/gen… #ornithology
2 #ISTC20 #Sesh2 Since the 1990s, and with an amazing network of observers (‘godwiteers’), we have marked thousands of Icelandic black-tailed godwits and tracked them on their annual journeys between Iceland and W Europe wadertales.wordpress.com/2015/10/06/the… #ornithology
3 #ISTC20 #Sesh2 The breeding and winter ranges of Icelandic godwits have expanded northwards, but have these changes involved (a) individuals shifting sites or (b) generational change, with new generations occupying different sites? besjournals.onlinelibrary.wiley.com/doi/full/10.11… #ornithology
Read 12 tweets
1 #ISTC20 #Sesh1 #ornithology Hello everyone. Thanks for the organizer of ISTC and Ryan. You can find my detailed information at researchgate.net/profile/Zhijun…. It’s my great honor to share the study of my team on shorebirds and their habitats in the Yellow Sea in China.
2 #ISTC20 #Sesh1 Migratory shorebirds depend on the linkage of breeding, nonbreeding, and stopover sites between them to maintain their population. The Yellow Sea (YS) region provides critical stopover sites for migratory shorebirds in the East Asian-Australasian Flyway (EAAF).
3 #ISTC20 #Sesh1 The Yellow Sea (YS), including Bohai Bay in the northwest, is surrounded by Chinese mainland and Korea Peninsular. It has the largest tidal wetland (more than 10,000 km2) worldwide.
Read 22 tweets
🎉🎉 It’s here!! 🎉🎉 Last Friday I promised a thread on prairie dogs & grassland birds! Well, here’s the thread you never knew you always wanted!

Buckle up for an intro to why I’m researching prairie dogs & grassland birds! RT if you enjoy! #ornithology #conservation Image
First, 2 disclaimers:

1) way more comfortable w/ in-person #scicomm so can clarify anything after!

2) thread based on what I’ve read *so far* in reviewing literature; I know lots about birds & conservation, but I am not (yet) an expert on this specific system.

Ok, let’s go!
So why study grassland birds + prairie dogs? Why should we care about either of them, let alone how they interact with each other?

Here’s a basic background & why it matters. Thread: (1/n)
Read 17 tweets
Ever wonder what a bird sees? If so, read on!

Purple has always been my favorite color. But purple's not just pretty--it's a special type of color. If you look at a rainbow, you won't see purple. That's because purple is what we color scientists call a 'nonspectral' color. 1/n
Instead of being formed by a single light or mixture of similar lights, purple is formed by simultaneously stimulating our non-adjacent red-sensitive and blue-sensitive cones in our eyes. 2/n
Since purple is my favorite color, & birds are my favorite animals, I wondered, "Can birds see purple?" Today, our paper led by Dr. Cassie Stoddard with @dylanhmorris @B_G_Hogan @DavidInouye1 Ed Soucy is in @PNASNews that shows that yes, birds can! pnas.org/content/early/… 3/n
Read 16 tweets
Today was my last Common Bird Monitoring round for this spring in Eau Blanche river valley -Belgium. A valley covered with meadows, farms here producing beef/milk. I'm monitoring there since 1990! This led me to some reflections about #biodiversity & #meat 👇
#ornithology 1/9 Image
If all farmland in BE were like this valley, we would not contemplate this kind of depressing #FarmlandBirdIndex graph. It shows the average trend of 15 species of bird specialized in farmland in Wallonia (source: @AvesBE & #DEMNA) 2/9 Image
In Eau Blanche valley, Tree Sparrow, Meadow Pipit, Turtle Dove are also declining, but at least some of them are still present. Stonechat, scarce in 1990, are now abundant. Today, I saw Black & Red Kites, Black & White Storks all 4 in the same field ! Unthinkable 30 yrs ago. 3/9
Read 10 tweets
Even in this strange time where we have to stay home, some of us are lucky enough to watch a fantastic migratory bird in their backyard, the Redwing -thread 👇 & more details in @AvesBE blog in FR (📷C Farinelle) #ornithology blog.aves.be/aves/2020/4/5/… Image
Redwing breeding range extends from NW Europe E to the Kolyma river bassin: 60% of the world population breed in Asia but almost all the population is wintering in WP, so Kolyma birds have to fly at least 6500km to reach nearest Caspian wintering grounds
datazone.birdlife.org/species/factsh… Image
Redwings, like other tree fruit foragers, are rather nomadic in winter. And they can shift completely their destination from one winter to the next. Some birds ringed in winter in Belgium were recovered as far as the Caucasus in a subsequent winter source: odnature.naturalsciences.be/bebirds/fr/rin… Image
Read 8 tweets
Last week I visited Collserola NP, Barcelona, with my friend Joan Estrada. He showed me a remarkable #invasivespecies, the Red-billed Leiothrix. But then I started looking into the papers about its possible harmfulness... ⏬ #ornithology

Right pic by ucumari photography CC. ImageImage
Member of Leiotrichidae (which includes Babblers and Laughingthrushes), RB Leiothrix is indigenous in Asia, introduced in Japan (despite its popular name in some languages "Rossignol du Japon"), in Hawaii and recently in several distinct areas in Europe
datazone.birdlife.org/species/factsh… Image
Unlike most invasive bird species, which thrive in highly anthropized landscape, RB Leiothrix selects natural habitat in its non native range - like here in Collserola broadleaf forest with dense undergrowth. Beside its nice colors, this is also why watching this bird is special Image
Read 12 tweets
A thread to cover some of the major - and I mean seriously, shockingly major - gaps, mistakes and problems with the #environmental impact assessment for Montijo airport in #Portugal.

First up: no #fieldwork. AT ALL. 1/
That's right – the EIA of a major international #airport proposed for the country’s most important #wetland site for #bird #conservation didn’t bother to actually count any #birds.

Instead, they depended on studies already published for other reasons.

How did that work out? 2/
Well, the data on birds feeding in the #intertidal- the largest and most important #habitat in the #SPA- was collected in 2002-3.

In the 17 years since, the #Tagus has changed a lot for birds. Improved #water treatment but drastic increase in #shellfish harvesting. 3/
Read 24 tweets

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