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Jay Jinsing Falk

@jjinsing.bsky.social
827 followers 437 following 93 posts

Smithsonian-Princeton Fellow | I study hummingbirds, evolution, sexual phenotypes, polymorphism, and color 💖 STRI Panama. he/they jayjinsing.github.io

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Reposted by Jay Jinsing Falk
Julia Van Etten @couchmicroscopy.bsky.social · 26/09/2026
Protists deserve the spotlight and so do scientists! This was such an honor but mostly, this project reminded me why I have the best job and friends/colleagues in the world! 🔬
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Michael Sheehan @sheehanmj.bsky.social · 23/09/2026
We are hiring an Asst Prof in Neuroethology (broadly defined) here at Cornell. If you work on neurobiology of animal behavior, check out the job and apply! academicjobsonline.org/ajo/jobs/32592
academicjobsonline.org
Cornell University, Neurobiology and Behavior (CALS)
Job #AJO32592, WDR-00061329 Assistant Professor: Neural Mechanisms of Natural Behavior, Neurobiology and Behavior (CALS), Cornell University, Ithaca, New York, US
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Journal of Avian Biology @avianbiology.bsky.social · 18/09/2026
New paper: what shapes diversification across the Andean foothills? In the white-tipped sicklebill, repeated isolation and reconnection appear to have contributed to population divergence. ➡️ vist.ly/5iyqa #ornithology #birds #climate
Journal of Avian Biology issue 3 cover showing a white-tipped sicklebill, Eutoxeres aquila. Photo: Paula Carrera LevyFig. 2 from the article: Phylogeography of Eutoxeres aquila: (A) geographic distribution of samples included in genetic analyses; (B) Bayesian phylogenetic tree based on the concatenated dataset of ND2 and cytb; and (C) median-joining haplotype networks based on ND2 and cytb sequences.Fig. 6 from the article: Resistance surface for Eutoxeres aquila derived from climatic and topographic data.
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ContempraInn 🌹 @contemprainn.bsky.social · 01/09/2026
The amazing rufous hornero bird building its iconic, oven-shaped clay nest on a tree branch. It’s waterproof and cozy
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Judith A.H. Smit @judithsmit.bsky.social · 24/08/2026
Caterpillars eat plants, right? 🌿 Not always, some are carnivorous! 🥩🐛 Our new paper documents the life history, behavior, and vibrations of Juditha odites. It feeds on treehoppers, then moves into ant nests to consume ant brood! 🐜🐛🦋 link.springer.com/article/10.1... @insectessociaux.bsky.social
link.springer.com
An insect-eating caterpillar associated with arboreal ants: life cycle, diet, social integration and substrate-borne vibrations - Insectes Sociaux
Herbivory is the predominant feeding strategy in Lepidoptera, whereas carnivory has evolved rarely. The life cycles of carnivorous species, however, remain poorly documented. Here, we confirm that Jud...
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Josef Uyeda @pseudacris.bsky.social · 11/08/2026
Really nice article laying out the semantics of sex/sexes that causes persistent confusion and arguing in our community. It lays out the undisputed patterns in biology and makes clear any "lack of consensus" on sex/sexes is arguing across different levels. academic.oup.com/icb/article/...
academic.oup.com
Evolution, Development, and the Incoherence of Sex: A Framework for Multiple Sex Concepts
Synopsis. The word sex can refer to at least seven distinct, evolutionarily related biological phenomena (0–6 below). Bacteria and archaea use mechanisms f
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Aramati Casper @aramaticasper.bsky.social · 13/08/2026
Why is there "no consensus" about sex in biology? Turns out, we're using seven different concepts. In "Evolution, development and the incoherence of sex" we name & elucidate these concepts. With Karen Warkentin and Jay Falk @jjinsing.bsky.social @sicbjournals.bsky.social doi.org/10.1093/icb/...
The cover of the article, in Integrative and Comparative Biology. The image caption is "Examples of seven biological phenomena sometimes called sex and the evolutionary relationships among them. The seven sex concepts are depicted with images: 0) horizontal gene transfer, 1) meiosis and syngamy, 2) anisogamy, 3) the gametes produced by an individual, 4) traits often associated with gamete production, 5) processes that bring gametes in proximity to facilitate syngamy, 6) processes/behaviors/traits derived from sex5.
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Brooke Fitzwater, PhD (she/her) 🐟🪱🏳️‍🌈♾️ @oceanfilly.bsky.social · 10/08/2026
I'm excited that our paper (@chrisblanar.bsky.social +others), "Spatial Variation in Sex-biased Parasitism of an Androdioecious Mangrove Fish" is out now as part of the "Sex Across Origins" symposium!@sicb.bsky.social @aramaticasper.bsky.social @jjinsing.bsky.social academic.oup.com/icb/article/...
academic.oup.com
Spatial Variation in Sex-biased Parasitism of an Androdioecious Mangrove Fish
Synopsis. Divergent selection between the sexes may enable parasites to better infect one host sex over the other, potentially leading to sex-biased parasi
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Brooke Fitzwater, PhD (she/her) 🐟🪱🏳️‍🌈♾️ @oceanfilly.bsky.social · 30/07/2026
I am beyond excited to share that our paper, "Neurodivergent Perceptions, Experiences, and Perspectives in Academic Biological Sciences Spaces" has been published! A 🧵incoming because this paper is so special to me and the co-authors. doi.org/10.1093/icb/...
doi.org
Neurodivergent Perceptions, Experiences, and Perspectives in Academic Biological Sciences Spaces
Abstract. Neurodiversity has received considerable attention recently from the general population and academic researchers, coinciding with an increase in
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Jeff Groh @jeffgroh.bsky.social · 28/07/2026
Avocados come in 2 varieties - A-types start each day female and switch to male midday. B-types do the reverse. In work just published from the last chapter of my PhD, we show this system evolved 40+million yrs ago and is regulated by alleles of 1 transcription factor www.pnas.org/doi/10.1073/...
pnas.org
Balanced polymorphism in a floral transcription factor underlies the ancient rhythm of daily sex alternation in avocado | PNAS
In avocado and certain wild relatives in Lauraceae, a highly synchronized daily rhythm of floral sex timing promotes cross-pollination between two ...
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Jay Jinsing Falk @jjinsing.bsky.social · 29/06/2026
On biopharma companies: "I would love to see the industry grow a spine here and raise its voice just a tiny bit. Am I expecting it to? Well, that’s another question entirely. But there’s still time to do the right thing."
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Maja Mielke (she/her) @maja-mielke.bsky.social · 25/06/2026
Female #hummingbirds dress like males to escape aggressive behavior! 🤯 Read more in my latest blog post for Beaks & Bones: 🪶🧪 beaksandbones.substack.com/p/male-looki... Original study by @jjinsing.bsky.social et al.: doi.org/10.1016/j.cu... #birds #ornithology #science #scicomm
beaksandbones.substack.com
Why do some female hummingbirds look like males?
Male-like plumage helps female hummingbirds escape social harassment.
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✺ 𝕸𝖔𝖙𝖍 ✺ @mothsprout.bsky.social · 12/03/2026
The little peeping peeper nests cozily 🪺
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Logan James @loganjames.bsky.social · 19/03/2026
Super excited about this new paper! and eternally grateful to the amazing coauthors, the wonderful network of colleagues who gave us stimuli, and all of the thousands of people that listened to animal sounds for us!
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Joe Hanly @hanliconius.bsky.social · 27/02/2026
New preprint form me and the McMillan lab at STRI and Martin lab at GWU, digging into scale cell type specification and differentiation in Heliconius wings, with some insights on the lncRNA gene ivory. www.biorxiv.org/content/10.6... Comments/suggestions welcome!
Heliconius erato demophoon sat on a pink, yellow and white lantana flower. The left side of the butterfly is white, while the right side is the usual black and red, but with some white clonal patches.
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Kristin Winchell @kmwinchell.bsky.social · 18/02/2026
Excited to share our new review in @natrevbiodiv.nature.com, coauthored w/allstar postdocs @vale-alaasam.bsky.social @annainthefield.bsky.social @anthonysnead.bsky.social Bridging island biogeography & evolutionary processes, we explore how eco-evo dynamics play out in the urban mosaic rdcu.be/e4tcj
rdcu.be
Eco-evolutionary dynamics shaping biodiversity in the urban mosaic
Nature Reviews Biodiversity - The urban mosaic is a complex assimilation of habitats, biotic and abiotic factors with eco-evolutionary influence on local and regional biodiversity. In this Review,...
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Liz Neeley @lizneeley.bsky.social · 11/02/2026
I'm able to keep doing my work by focusing on inspiring leaders wherever I find them. Today I'm thinking about Sue Pierre & her astonishing work with the Critical Ecology Lab. Latest: www.criticalecologylab.org/lab-news/cri... Her episode with @ologies.bsky.social www.alieward.com/ologies/crit...
criticalecologylab.org
Critical Ecology Lab Founder Delivers Historic Lectures in Nuuk, Greenland, Bridging Arctic and Caribbean Colonial Histories — Critical Ecology Lab
Dr. Suzanne Pierre becomes among the first guest lecturers for Greenland's inaugural natural sciences degree program NUUK, GREENLAND — In January 2026, Dr. Suzanne Pierre, founder and CEO of the C...
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Nathan Senner @drgodwit.bsky.social · 10/02/2026
Please repost! We are looking for two field technicians to work on our deer mouse project in the Colorado Rockies this spring-fall. Learn about physiology, ecology, and evolution, all in one project! Not to mention that you get to be in the ⛰️. Reach out if you have any questions.
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Jay Jinsing Falk @jjinsing.bsky.social · 30/01/2026
I often use @rossbrooks.co.uk articles in my teaching materials and have been waiting for a book for years! Excited to see this happening, congrats!!
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Elizabeth Hobson @elizabethhobson.bsky.social · 28/01/2026
Are you (or do you know someone) recently graduated from undergrad looking to beef up your skills and experience prior to starting grad school/career? Do you like social drama and parakeets? Come join my team! I'm looking for two people to start very soon!! tinyurl.com/59rf8jcy
Graphical ad for Hobson Lab Parakeet sociality & cognition Postbac Research Technician, with a graphic showing a flock of monk parakeets flying towards a social network, two unmarked monk parakeets perched, and examples of our individually color-marked birds showing their dye marks and color codes
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Emily V Griffith @e-v-griffith.bsky.social · 06/01/2026
Two - count ‘em - two #SICB2026 talks that I’m giving today, Tuesday, January 6. Come watch me pour the absolute last of my energy into telling stories about two rather unique birds and about how nature is really weird and wonderful.
A funky looking mallard duck named lily - 10:15am in room B113A mystery oriole - 2:15PM in room C125/126
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Emily V Griffith @e-v-griffith.bsky.social · 05/01/2026
@jjinsing.bsky.social , an organizer of the Sex Across Origins symposium at #SICB2026, talks about how we can think of sex beyond the binary. There are many traits beyond gametes that shape an individual’s ability to reproduce. By treating sexes as polymorphic, we can communicate more clearly.
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Brooke Fitzwater, PhD (she/her) 🐟🪱🏳️‍🌈♾️ @oceanfilly.bsky.social · 05/01/2026
I am currently at #SICB2026! I am in the Multimedia Panel tomorrow at 12:15, and will also be presenting my research on Tues. at 11:15, and mine and @taorminalepore.bsky.social's symposium, "Disabled and neurodivergent perception, community, and identity in the biosciences" is Wednesday!
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Jay Jinsing Falk @jjinsing.bsky.social · 05/01/2026
It’s happening!! #SICB2026 Tomorrow, from 8AM to 3:30PM come to C120/121/122 for ✨Sex Across Origins: Questioning animal-centric assumptions and developing integrative frameworks.✨ Also! 3 fantastic complimentary sessions Tuesday in B113, with a special focus on education in the morning.
Logo for the Sex Across Origins symposium. A round cell looks like it’s about to divide, with spindle fibers. In the middle there are two rainbow-colored phylogenies. Outside the cell, it says “Sexes Across Origins” on top, and “SICB 2026” on the bottom
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Biology LGBTQ+ Journal Club @oxfordbiologylgbtq.bsky.social · 20/11/2025
We are delighted to announce our upcoming LGBTQ+ seminar given by Dr Ross Brooks who will be talking about his upcoming book, Darwin and the Queer Origins of Life! 2nd December @ 4pm in the Life and Mind Building, open to all members of Oxford university 🥳🏳️‍🌈🏳️‍⚧️ @rossb-brighton.bsky.social #QueerBiology
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Barbara J. King @bjking.bsky.social · 31/10/2025
"The project that was terminated was on this hummingbird, the white-necked jacobin....I suspect that it has something to do with studying a species that doesn’t fit the binary." Researcher @jjinsing.bsky.social interviewed by @carlzimmer.com #birds #nature #science #fundscience #nonbinary 🧪
nytimes.com
He Studied Why Some Female Birds Look Like Males
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Julia Van Etten @couchmicroscopy.bsky.social · 13/10/2025
If anyone is interested in expanding my ongoing Paulinella projects and/or doing other work in algal genomics in my lab that doesn’t fully exist yet (but will exist at the time the funding for this starts), please reach out! I’d love to help develop a cool project with you!
simonsfoundation.org
Simons Postdoctoral Fellowships in Plant Biology
Simons Postdoctoral Fellowships in Plant Biology on Simons Foundation
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Andrew D. Cronin @andrewdcronin.bsky.social · 08/09/2025
How do light and noise pollution impact selection on sexual signals? We tested mate attraction and bat predation on túngara frogs in the field. Full text: doi.org/10.1093/jeb/... #evolutionarybiology #animalbehavior @eseb.bsky.social @jevbio.bsky.social Photo: Grant Maslowski
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Shelly Gaynor @shellygaynor.bsky.social · 01/10/2025
If you are a current PRFB fellow, we have a slack where all of this and more is discussed. Current fellows, please send me a message and I can add you.
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Sara Lipshutz (she/her) @jacanamama.bsky.social · 25/09/2025
Excited to read this review paper by @juehlz.bsky.social and Jenn Houtz! nsojournals.onlinelibrary.wiley.com/doi/10.1002/...
nsojournals.onlinelibrary.wiley.com
Gut microbiome–diet interactions in wild birds
Birds show global declines, and understanding the relationship between avian diet and fitness can both answer basic questions in physiological ecology and inform conservation efforts. Diet-induced ch...
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EvolDir @evoldir.bsky.social · 24/09/2025
The Dijkstra lab at CMU seeks PhD students for Fall 2026, funded by an NSF award, focusing on aggression in cichlid fish. Apply to Dr. Dijkstra by Oct. 20. More info: sites.google.com/site/peterdijkstra… #phd
sites.google.com
DIJKSTRA LAB - Social behavior and physiology
Welcome to the Dijkstra lab at Central Michigan University! We study how social competition and oxidative stress shape brain function, stress resilience, and evolutionary processes. Using African cichlid fish (our primary model for studying social behavior), we combine behavioral, physiological,
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Dr. Kathleen M. Munley @thefishiedoc.bsky.social · 19/09/2025
I am recruiting 1-2 graduate students (M.S. or Ph.D. track) to join my lab at @psychualberta.bsky.social in Fall 2026! Please share widely, and if you are interested in endocrinology, animal behavior, neuroscience, and/or seasonal biology, I would love to chat! 🐟🧠🧬🍂
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Kathy Darragh @kdarragh.bsky.social · 11/09/2025
Buscando estudiantes para empezar en agosto de 2026. Estudiamos la evolución de las señales químicas de los insectos con biología evolutiva, ecología química, biología molecular, y estudios de comportamiento. Más información aquí: tinyurl.com/mrxchwfm
tinyurl.com
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Kathy Darragh @kdarragh.bsky.social · 11/09/2025
I'm looking for PhD students to join the lab starting August 2026. We study the evolution of insect chemical signals so if you're interested in evolutionary biology, chemical ecology, molecular biology, behavior, or genetics, this could be a good fit for you! More info here: tinyurl.com/mrxchwfm
Green butterfly sat on a flower.
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Jay Jinsing Falk @jjinsing.bsky.social · 14/09/2025
Thank you Suvi and everyone in the environmental physiology lab @uniofjyvaskyla.bsky.social!! So incredibly warm, friendly, and inspiring! Cheers!
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SICB journals @sicbjournals.bsky.social · 10/09/2025
IOB "...To test this hypothesis, we examined metabolic rates of morphs using flow-through respirometry to record CO2 output..." Testing for Differences in #Metabolism Among Females and Dimorphic Males of Four Dung #Beetle Species Killeffer et al doi.org/10.1093/iob/... #insects #bugs #dimorphism
Fig. 1
CO2 production for four species of dung beetle showing sexual and male dimorphism. (A) CO2 production for morphs of each species not accounting for beetle mass or activity. Boxplots correspond to the first and third quartiles, and whiskers extend to the most extreme data value within 1.5 times the interquartile range. Jittered points show data for individual beetles. (B) Expected CO2 production from beetles of a given morph with average mass for each species and average activity across species. Points show least squares means and 95% CIs around the means. Letter labels indicate significant differences.
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Liz Neeley @lizneeley.bsky.social · 31/08/2025
When we have so many painful and dangerous things to grapple with, it makes the joyful things that much more precious. Seek them out, save them, share them! Here’s one I’m *really* excited about: www.okaybutbirds.com by the hilarious & charming @drscottataylor.bsky.social
okaybutbirds.com
OKAY, BUT... BIRDS
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Emily V Griffith @e-v-griffith.bsky.social · 13/08/2025
@lannhiphung.bsky.social studies the link between genomic history and sexual selection in bowerbirds, an iconic example of sexual signaling through both behavioral and physical attributes. There are at least 36 genes under different levels of selection pressure in one or multiple clades! #AOS25
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Emily V Griffith @e-v-griffith.bsky.social · 14/08/2025
Skipping live-scicomming the next session because I’m in it! If you’re at #AOS25 come see me talk about a weird bird and it’s cool genome at 4:45 in Genomics 3 (Ballroom A). (Or email me any time!)
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Emily V Griffith @e-v-griffith.bsky.social · 14/08/2025
Scott Taylor, on behalf of @jjinsing.bsky.social, tells the story of a potential instance of caterpillar mimicry in the White-necked Jacobin. The fuzzy baby hummingbird uses the unusually wiggles in the nest, mimicking local caterpillars & potentially helping to avoid some predation! #AOS25
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Brooke Fitzwater, PhD (she/her) 🐟🪱🏳️‍🌈♾️ @oceanfilly.bsky.social · 07/08/2025
I am opening scientific illustration commissions! Below are some examples of my work. Please contact me via bfitzwater@crimson.ua.edu if you are interested!
Watercolor illustration of a crabWatercolor illustration of male and hermaphrodite rivulus fishWatercolor illustration of a sea otter in kelpPen and colored pencil illustration of a green sea turtle
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Matías I. Muñoz @matiasimunoz.bsky.social · 02/08/2025
Do birds tune their songs to their hearing? Is there tight coevolution between avian vocal signals and hearing-or do signallers and perceivers evolve more loosely? It turns out perfect tuning is not required... Preprint: www.biorxiv.org/content/10.1... #bioacoustics #prattle 💬 #ornithology 🪶
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Geetha Iyer @geetha-iyer.bsky.social · 04/08/2025
🧵Open submissions call! I recently took on a new position as Associate Editor of Creative Nonfiction at ISLE: Interdisciplinary Studies in Literature and Environment. If you have work that intersects people+nature in some significant way, I want to see it! Read on for submissions criteria...
Logo for the journal ISLE: Interdisciplinary Studies in Literature and Environment, featuring a black line drawing of a wizened cypress-like tree against a neutral background.
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David Katz @katzlab.bsky.social · 04/08/2025
Stand up for science. Stand up as if our lives and our economy depend on it. Because, actually, they do. #standupforscience
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Society for Integrative and Comparative Biology @sicb.bsky.social · 01/08/2025
We share your excitement @jacanamama.bsky.social 🙌thanks for spreading the word & thanks for being part of SICB Portland.
media.tenor.com
a woman with a surprised look on her face is holding her hands to her face
ALT: a woman with a surprised look on her face is holding her hands to her face
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Jay Jinsing Falk @jjinsing.bsky.social · 28/07/2025
Also! Want to be a part of this broader community, but don't know if your presentation fits the theme? Maybe you'd like to submit a paper to the associated ICB special issue? Please get in touch! We are Karen Warkentin, @aramaticasper.bsky.social, and me :)
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Sara Lipshutz (she/her) @jacanamama.bsky.social · 31/07/2025
I'm SOOOO EXCITED for this Sex(es) Across Origins Symposium at #SICB2026!!!! I just submitted an abstract for the complementary session (on bird plumage and social selection with @gamaevo.bsky.social), and I hope you consider applying, too! @sicb.bsky.social @sicbjournals.bsky.social
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Catherine Sheard @sheardcat.bsky.social · 30/07/2025
Not to state the obvious, but some birds fly better than others. The ones that are awesome at flying -- this means they can get around obstacles, right? Expand their ranges as needed? Maybe be a little less vulnerable to extinction? Turns out it's SUPER complicated. www.cell.com/current-biol...
cell.com
A new time tree of birds reveals the interplay between dispersal, geographic range size, and diversification
Flight may affect the dispersal and evolution of birds. Using a new evolutionary tree, Claramunt et al. find that efficient fliers have broader geographic ranges, and speciation reduces range size, bu...
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Jay Jinsing Falk @jjinsing.bsky.social · 28/07/2025
Hey SICB 2026 @sicb.bsky.social! Don't forget about the Sex(es) Across Origins Symposium 🍄🦠🐌🌽 If you'd like to give a talk or poster session or poster session in our ✨complementary sessions✨, make sure to specify that in your abstract submission when you submit! (deadline, Aug 27)
S04: Sex across origins: Questioning animal-centric assumptions and developing integrative frameworks
Short title: Sex across origins

Organizers: 
A. M. Aramati Casper, Colorado State University
Jay J. Falk, University of Colorado - Boulder
Karen M. Warkentin, Boston University and the Smithsonian Tropical Research Institute

Sex and reproduction have evolved in diverse ways across eukaryotes, yet biological concepts of sex remain heavily shaped by human and canonical animal models. This symposium seeks to challenge narrow definitions by embracing the full complexity of sexual phenotypes, reproductive strategies, and developmental origins across taxa. By convening an interdisciplinary group of researchers working on plants, fungi, animals, and protists, we aim to identify shared principles, highlight irreconcilable differences, and stimulate new frameworks for understanding sex in biology. The symposium will foster integrative dialogue across career stages, disciplines, and organismal systems to advance a more inclusive and accurate understanding of reproductive diversity.
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Gavin Leighton @gavinleighton.bsky.social · 09/07/2025
I will be presenting research on how the abundance of mimics and models affect the social performance and competitiveness of these groups. If you're keen on behavior and geospatial data this might be of particular interest. That is happening tomorrow, Thursday (07/10) at 10:45 AM in Chesapeake B.
Image of the USA and the scaled abundance of species next to a dominance hierarchy.
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