Jay Jinsing Falk
@jjinsing.bsky.social
650 followers 400 following 81 posts
(Terminated) NSF Postdoctoral Fellow | I study hummingbirds, evolution, sexual phenotypes, polymorphism, and color 💖 STRI Panama and CU Boulder. he/any jayjinsing.github.io
Posts Media Videos Starter Packs
Reposted by Jay Jinsing Falk
andrewdcronin.bsky.social
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
Reposted by Jay Jinsing Falk
shellygaynor.bsky.social
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.
omearabrian.bsky.social
Note for NSF PRFB, etc.:

"The Awards Cash Management Service (ACM$) and the Invoice Processing Platform (IPP) will remain available for the submission and processing of valid payments for recipients and contractors."

nsf-gov-resources.nsf.gov/files/nsf-sh...

Though prob. wise to get paid asap
Reposted by Jay Jinsing Falk
thefishiedoc.bsky.social
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! 🐟🧠🧬🍂
Reposted by Jay Jinsing Falk
kdarragh.bsky.social
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
Reposted by Jay Jinsing Falk
kdarragh.bsky.social
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.
jjinsing.bsky.social
Thank you Suvi and everyone in the environmental physiology lab @uniofjyvaskyla.bsky.social!! So incredibly warm, friendly, and inspiring! Cheers!
suviruuskanen.bsky.social
@jjinsing.bsky.social visiting our lab for collaboration and giving an amazing seminar on female sexual dimorphism !
Reposted by Jay Jinsing Falk
sicbjournals.bsky.social
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.
Reposted by Jay Jinsing Falk
lizneeley.bsky.social
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
OKAY, BUT... BIRDS
www.okaybutbirds.com
Reposted by Jay Jinsing Falk
e-v-griffith.bsky.social
@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
Reposted by Jay Jinsing Falk
e-v-griffith.bsky.social
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!)
Reposted by Jay Jinsing Falk
e-v-griffith.bsky.social
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
Reposted by Jay Jinsing Falk
oceanfilly.bsky.social
I am opening scientific illustration commissions! Below are some examples of my work. Please contact me via [email protected] if you are interested!
Watercolor illustration of a crab Watercolor illustration of male and hermaphrodite rivulus fish Watercolor illustration of a sea otter in kelp Pen and colored pencil illustration of a green sea turtle
Reposted by Jay Jinsing Falk
matiasimunoz.bsky.social
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 🪶
Reposted by Jay Jinsing Falk
geetha-iyer.bsky.social
🧵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.
Reposted by Jay Jinsing Falk
katzlab.bsky.social
Stand up for science. Stand up as if our lives and our economy depend on it. Because, actually, they do. #standupforscience
cdelawalla.bsky.social
Congress says they have our back...let's hold them to their word!

All gas, no breaks this August with the 31 Days of Action campaign.

Sign up for our daily action notes here: act.standupforscience.net/forms/31-day...
Reposted by Jay Jinsing Falk
sicb.bsky.social
We share your excitement @jacanamama.bsky.social 🙌thanks for spreading the word & thanks for being part of SICB Portland.
Reposted by Jay Jinsing Falk
jjinsing.bsky.social
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 :)
jjinsing.bsky.social
👀 I'm stoked to see what your talk is about!!
Reposted by Jay Jinsing Falk
jacanamama.bsky.social
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
jjinsing.bsky.social
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.
Reposted by Jay Jinsing Falk
sheardcat.bsky.social
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...
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...
www.cell.com
jjinsing.bsky.social
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 :)
jjinsing.bsky.social
We'll be covering a broad range of topics, from organisms with non-canonical sexes and sexual systems, to evolutionary & developmental origins, to education research on how to teach about sex-related topics!

In short, if you *think* you might fit in, you probably do. Not sure? send a message!