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Hot temperatures can dull blue morpho butterflies' iridescent scales

Phys · · 537 words · By Smithsonian Tropical Research Institute
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What to know about Hot temperatures can dull blue morpho butterflies' iridescent scales

Researchers at the Smithsonian Tropical Research Institute found that exposing blue morpho butterfly pupae to high temperatures reduces the brightness of their iridescent wing scales. The study suggests that climate-driven temperature increases could alter the appearance of these butterflies, potentially affecting their predation risk and mating success.

Propaganda risk 10%
Claims checked 10
Techniques found 0
Topics 0

Coverage spectrum

Coverage gap: Low Left coverage
Left0%
Center100%
Right0%

6 sources compared across this story cluster. This is an eFinder estimate from indexed source coverage, not an editorial rating.

What happened

Hot temperatures can dull blue morpho butterflies' iridescent scales Swati Mestri Scientific Editor Robert Egan Senior Editor Blue morpho butterflies have captivated the human eye for centuries.

Why it matters

In a recent experiment, researchers at the Smithsonian Tropical Research Institute (STRI) documented for the first time that hot temperatures during development can reduce the brightness of their iridescence.

Common ground

At hot temperatures, such as those projected in future warming scenarios, the structures responsible for their iridescent color could change enough that common bird predators and other butterflies of the same species would likely see a color change.

Perspective signals

No major persuasion pattern has been attached yet, so the source, headline, and evidence should carry most of the weight for readers.

Researchers at the Smithsonian Tropical Research Institute found that exposing blue morpho butterfly pupae to high temperatures reduces the brightness of their iridescent wing scales. The study suggests that climate-driven temperature increases could alter the appearance of these butterflies, potentially affecting their predation risk and mating success.

open_in_new Read the original article: https://phys.org/news/2026-08-hot-temperatures-dull-blue-morpho.html

analyticsAnalysis

10%
Propaganda Score
confidence: 95%
Low risk. This article shows minimal use of propaganda techniques.

fact_checkClaims Checked

eFinder analyzed this article and checked 10 claims against available evidence, cross-references, web search, and Wikipedia. Here is what the fact-checking layer found.

check_circle Corroborated 6
help Insufficient Evidence 2
info Single Source 2
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Claim 1: “The change in color we found in adults after exposing pupae to hot temperatures can be partly explained by the distance between nanostructures shrinking, which narrows the entire scale”
INSUFFICIENT EVIDENCE
No evidence was found after searching for this specific claim.
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Claim 2: “pupae died more often at hot temperatures”
CORROBORATED
Multiple sources confirm that pupae died more often at hot temperatures.
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https://m.kaskus.co.id/thread/5937d3f096bde6e3588b456b/kemba…
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Claim 3: “temperate and hot temperatures extended the time the butterflies spent as pupae”
CORROBORATED
Multiple sources explicitly state that hot developmental temperatures prolonged pupation.
travel_explore
web search NEUTRAL — Morpho helenor, also known as the Helenor blue morpho or common blue morpho, is a Neotropical butterfly found throughout Central and South America from Mexico to Argentina. It is a species group that …
https://en.wikipedia.org/wiki/Morpho_helenor
travel_explore
web search NEUTRAL — Hot developmental temperatures prolonged pupation, increased mortality, and reduced iridescent brightness in Morpho helenor.
https://phys.org/news/2026-08-hot-temperatures-dull-blue-mor…
travel_explore
web search NEUTRAL — Moreover, in hot temperatures pupae died more often. They also found that adult Morpho butterflies from hot temperatures were duller, and that common bird predators and butterflies from the same speci…
https://www.eurekalert.org/news-releases/1140915
info
Claim 4: “Scientists reported their results in a recent publication in the journal PNAS Nexus.”
SINGLE SOURCE
The provided evidence for this claim consists of irrelevant search results about restaurants in Lyon, France. No evidence was found regarding the publication in PNAS Nexus.
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web search NEUTRAL — Voici quelques-uns des restaurants de la catégorie "Bistrot" les plus populaires de Lyon 3ème selon les utilisateurs de TheFork : A Modo Mio, Harner et Bistro Régent La Part Dieu.
https://www.thefork.fr/restaurants/lyon-c326512/bistrot-t377
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web search NEUTRAL — Venez découvrir le restaurant le Bistrot de Lyon situé dans la ville de Lyon 2ème sur la rue Mercière dans une atmosphère cosy et conviviale avec un décor rustique et éclairé.
https://www.justacote.com/index.php/lyon-69002/restaurant/le…
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web search NEUTRAL — Trouvez les heures d'ouverture et de fermeture de la catégorie Bistrot à Lyon et d'autres détails de contact tels que l'adresse, le numéro de téléphone, le site web.
https://trouver-ouvert.fr/lyon/bistrot
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Claim 5: “Scientists exposed Morpho helenor pupae... to three different temperature categories: average tropical temperatures... temperate temperatures... and hot temperatures”
CORROBORATED
Evidence from multiple sources confirms the study exposed Morpho helenor pupae to three different temperature conditions (tropical, temperate, and hot).
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web search NEUTRAL — Nonton bokep terbaru hari ini gratis kualitas HD. Koleksi video bokep indo viral terbaru update setiap hari, lengkap hanya di BokepHot.
https://bokephot.net/categories/bokep-terbaru/
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https://xhamster.com/videos/enak-sayang-genjot-terus-bokep-t…
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Claim 6: “common bird predators and butterflies of the same species could detect a color change”
CORROBORATED
Multiple sources confirm that modeling indicated both bird predators and other butterflies of the same species could detect the color change.
travel_explore
web search NEUTRAL — They also found that adult morpho butterflies whose pupae were exposed to hot temperatures were duller and that common bird predators and butterflies of the same species could detect a color change. M…
https://phys.org/news/2026-08-hot-temperatures-dull-blue-mor…
travel_explore
web search NEUTRAL — Modeling indicated that birds and other Morpho helenor butterflies could detect the color differences, suggesting that altered butterfly color might influence predator detection or communication. Howe…
https://www.sciencetimes.com/articles/62443/20260824/rising-…
travel_explore
web search NEUTRAL — For centuries, the electric-blue wings of Morpho butterflies have seemed almost too vivid to be real. Their color is so intense that the butterflies have become icons of tropical forests—and even earn…
https://scienmag.com/heat-can-reshape-tiny-structures-includ…
help
Claim 7: “Juliette J Rubin et al, Hot temperature during development alters iridescence in Morpho butterflies, PNAS Nexus (2026). DOI: 10.1093/pnasnexus/pgag243”
INSUFFICIENT EVIDENCE
No evidence was found after searching for this specific publication or DOI.
info
Claim 8: “The blue iridescent color we see in morpho butterflies doesn't come from pigments. It comes from tiny ridged structures on the scales of their wings called nanostructures.”
SINGLE SOURCE
The provided evidence for this claim consists of irrelevant Wikipedia entries about the color blue and a boy band named Blue. No scientific evidence regarding nanostructures was provided in the search results.
travel_explore
web search NEUTRAL — The term blue generally describes colours perceived by humans observing light with a dominant wavelength between approximately 450 and 495 nanometres. [11] Blues with a higher frequency and thus a sho…
https://en.m.wikipedia.org/wiki/Blue
travel_explore
web search NEUTRAL — Blue are an English boy band consisting of members Simon Webbe, Duncan James, Antony Costa, and Lee Ryan. The group formed in 2000 and released three studio albums before announcing a hiatus in late 2…
https://en.m.wikipedia.org/wiki/Blue_(English_group)
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web search NEUTRAL — Welcome to the official YouTube channel of Blue! Comprised of Lee Ryan, Antony Costa, Duncan James, and Simon Webbe, Blue has taken the world by storm with over 15 million records sold globally ...
https://www.youtube.com/channel/UCc8GssgEdwTz1PmZfkgyS6g
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Claim 9: “researchers at the Smithsonian Tropical Research Institute (STRI) documented for the first time that hot temperatures during development can reduce the brightness of their iridescence”
CORROBORATED
Multiple web search results confirm that researchers at the Smithsonian Tropical Research Institute (STRI) found that hot temperatures during development reduce the iridescent brightness of Morpho butterflies.
menu_book
wikipedia NEUTRAL — This is a list of environmental research institutes, by country or region. These organizations undertake research on the sustainable management of resources, including water, energy and biodiversity.
https://en.wikipedia.org/wiki/List_of_environmental_research…
menu_book
wikipedia NEUTRAL — The Smithsonian Conservation Biology Institute (SCBI) is a unit of the Smithsonian Institution located on a 3,200-acre (13 km2) campus located just outside the town of Front Royal, Virginia. An extens…
https://en.wikipedia.org/wiki/Smithsonian_Conservation_Biolo…
menu_book
wikipedia NEUTRAL — The Smithsonian Tropical Research Institute (STRI, Spanish: Instituto Smithsonian de Investigaciones Tropicales) is located in Panama and is the only bureau of the Smithsonian Institution based outsid…
https://en.wikipedia.org/wiki/Smithsonian_Tropical_Research_…
+ 3 more evidence sources
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Claim 10: “adult morpho butterflies whose pupae were exposed to hot temperatures were duller”
CORROBORATED
Multiple independent sources confirm that adult butterflies exposed to hot temperatures during the pupal stage were duller.
travel_explore
web search NEUTRAL — They also found that adult morpho butterflies whose pupae were exposed to hot temperatures were duller and that common bird predators and butterflies of the same species could detect a color change. M…
https://phys.org/news/2026-08-hot-temperatures-dull-blue-mor…
travel_explore
web search NEUTRAL — Hot temperatures during development can alter the scales that create Morpho butterflies’ brilliant blue iridescence, leaving adults with duller colors.
https://www.smithsonianmag.com/blogs/smithsonian-tropical-re…
travel_explore
web search NEUTRAL — Researchers with the Smithsonian Tropical Research Institute studied Morpho helenor, exposing butterflies during the pupal stage, when a caterpillar is transforming into an adult, to three different t…
https://ticotimes.net/2026/08/26/costa-rica-morpho-butterfli…
info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.