Dyr i Detaljen

#85 Amazonas dyreliv (3/9) - Camouflage: Gennemsigtige frøer og insekter der snyder forskere!

Hvordan bliver et dyr næsten usynligt? Midt i Amazonas sidder en lille frø, der kan gøre sig næsten gennemsigtig og gemme sit blod for at forsvinde fra rovdyr. Og den er kun begyndelsen. I denne episode dykker vi ned i Amazonas’ vilde verden af camouflage – hvor dyr ikke bare gemmer sig, men narrer selv de skarpeste rovdyr ved at ligne blade, bark og døde grene. I episoden kan du høre om: • Glasfrøen, der kan blive gennemsigtig • Amazonas’ “falske kamæleoner” • Blad- og pindelignende insekter, der snyder selv forskere • Knælere der ligner bark – og både jager og gemmer sig • Pacman-frøer med kæmpe bid og ekstrem camouflage • Fuglen potoo, der ligner en gren til perfektion Billeder af: Graham Wise from Brisbane, Australia, CC BY 2.0 , via Wikimedia Commons Geoff Gallice from Gainesville, FL, USA, CC BY 2.0 , via Wikimedia Commons Pavel Kirillov from St.Petersburg, Russia, CC BY-SA 2.0 , via Wikimedia Commons Pavel Kirillov, CC BY-SA 4.0 , via Wikimedia Commons Allissondias, CC BY-SA 4.0 , via Wikimedia Commons Svenson G, CC BY 4.0 , via Wikimedia Commons Bernard DUPONT from FRANCE, CC BY-SA 2.0 , via Wikimedia Commons Jiri Hodecek, CC BY-SA 4.0 , via Wikimedia Commons Bernard DUPONT from FRANCE, CC BY-SA 2.0 , via Wikimedia Commons Kilder Videnskabelige artikler * Major, T., Hesten, A. C. M., Stipala, J., Cant, M. A., Stevens, M., & Troscianko, J. (2025). Flap-necked chameleons change colour to match their background. Biology Letters, 21(8), 20250134. https://doi.org/10.1098/rsbl.2025.0134 [https://doi.org/10.1098/rsbl.2025.0134] * Madeira-Ott, T., Thyssen, P. J., & Costa, J. (2020). Phasmatodea in Brazil: Status, new record, and molecular tools for species identification. Neotropical Entomology, 49, 916–922. https://doi.org/10.1007/s13744-020-00798-3 [https://doi.org/10.1007/s13744-020-00798-3] * Ghirotto, V. M. (2021). Morphology, taxonomy, and biology of Canuleius similis. Zoologischer Anzeiger, 292, 30–57. https://doi.org/10.1016/j.jcz.2021.02.009 [https://doi.org/10.1016/j.jcz.2021.02.009] * Castner, J. L., & Nickle, D. A. (1995). Color polymorphism in leaf-mimicking katydids. Journal of Orthoptera Research, 4, 99–103. https://doi.org/10.2307/3503464 [https://doi.org/10.2307/3503464] * Braun, H. (2015). Biology and taxonomy of Typophyllum species. Zootaxa, 4012(1), 1–32. https://doi.org/10.11646/zootaxa.4012.1.1 [https://doi.org/10.11646/zootaxa.4012.1.1] * de Alcantara Viana, J. V., Campos Duarte, R., Vieira, C., et al. (2023). Crypsis and disruptive coloration in Amazonian mantises. Scientific Reports, 13, 19985. https://doi.org/10.1038/s41598-023-46204-x [https://doi.org/10.1038/s41598-023-46204-x] * Cestari, C., Gonçalves, C., & Sazima, I. (2018). Perch flexibility in the common potoo. The Wilson Journal of Ornithology, 130, 191–199. https://doi.org/10.1676/16-175.1 Andre https://worldrainforests.com/0306.htm [https://worldrainforests.com/0306.htm] https://www.rainforest-alliance.org/species/northern-glass-frog/ [https://www.rainforest-alliance.org/species/northern-glass-frog/] https://www.ifaw.org/animals/glass-frogs [https://www.ifaw.org/animals/glass-frogs] https://www.nibib.nih.gov/news-events/newsroom/let%E2%80%99s-clear-things-how-do-glassfrogs-achieve-transparency?utm_source=chatgpt.com [https://www.nibib.nih.gov/news-events/newsroom/let%E2%80%99s-clear-things-how-do-glassfrogs-achieve-transparency?utm_source=chatgpt.com] https://en.wikipedia.org/wiki/Chameleon [https://en.wikipedia.org/wiki/Chameleon] https://www.reptilesofecuador.com/polychrus_marmoratus.html [https://www.reptilesofecuador.com/polychrus_marmoratus.html] https://web.archive.org/web/20160303230855/http://www.xerces.org/wp-content/uploads/2010/06/naskrecki_katydids_wings-sp10.pdf [https://web.archive.org/web/20160303230855/http://www.xerces.org/wp-content/uploads/2010/06/naskrecki_katydids_wings-sp10.pdf] https://entomologytoday.org/2014/03/19/nineteen-speedy-new-praying-mantis-species-discovered-from-central-and-south-america/ [https://entomologytoday.org/2014/03/19/nineteen-speedy-new-praying-mantis-species-discovered-from-central-and-south-america/] https://www.notesfromtheroad.com/roam/potoo-bird.html [https://www.notesfromtheroad.com/roam/potoo-bird.html] https://fatbirder.com/ornithology/nyctibiidae-potoos/ [https://fatbirder.com/ornithology/nyctibiidae-potoos/] https://www.iflscience.com/is-the-spiny-devil-katydid-the-strangest-insect-in-the-world-you-tell-us-79091 [https://www.iflscience.com/is-the-spiny-devil-katydid-the-strangest-insect-in-the-world-you-tell-us-79091] https://amphibiaweb.org/species/5720 [https://amphibiaweb.org/species/5720] https://puertomaldonadotours.com/amazon-horned-frog/ [https://puertomaldonadotours.com/amazon-horned-frog/]

Lytternes Dyr: Isfuglen - Danmarks mest eksotiske fugl!

Tak til Theo for forslaget! Har du et yndlingsdyr, som du gerne vil høre nogle fun facts om? Så skriv en kommentar eller en besked på Instagram! Kilder https://lex.dk/isfugle [https://lex.dk/isfugle] https://dofbasen.dk/danmarksfugle/art/08310 [https://dofbasen.dk/danmarksfugle/art/08310] https://novana.au.dk/fugle/fugle-2020-2021/ynglefugle/ynglefuglearter/isfugl [https://novana.au.dk/fugle/fugle-2020-2021/ynglefugle/ynglefuglearter/isfugl]

Lytternes Dyr: Flyvefisken, fisken der ikke flyver?

Tak til Bæster for forslaget! Har du et dyr, som du gerne vil høre om? Så skriv det i kommentaren eller på Instagram! Kilder https://www.nwf.org/Educational-Resources/Wildlife-Guide/Fish/Flying-Fish [https://www.nwf.org/Educational-Resources/Wildlife-Guide/Fish/Flying-Fish] https://www.deepseaworld.com/blog/can-fish-fly-5-interesting-facts-about-the-flying-fish/ [https://www.deepseaworld.com/blog/can-fish-fly-5-interesting-facts-about-the-flying-fish/]

Lytternes Dyr: Geparden - Verdens Hurtigste Kat!

Tak til Sylvie for forslaget! Har du et dyr du gerne vil høre om? så skriv det i kommentarene eller på instagram! Kilder https://www.natgeokids.com/uk/discover/animals/general-animals/cheetah-facts/ [https://www.natgeokids.com/uk/discover/animals/general-animals/cheetah-facts/] https://www.pbs.org/articles/fun-facts-about-cheetahs-big-cats-247 [https://www.pbs.org/articles/fun-facts-about-cheetahs-big-cats-247] https://normandie-univ.hal.science/hal-02139428v1 [https://normandie-univ.hal.science/hal-02139428v1] https://cheetah.org/da/learn/about-cheetahs/ [https://cheetah.org/da/learn/about-cheetahs/] https://www.catsg.org/living-species-cheetah [https://www.catsg.org/living-species-cheetah]

#84 Amasonas Dyrelliv (2/9) Stærke Jaguarer, Kloge Anakondaer og Den sorte Kaiman - Hvor vigtige er toprovdyr for Amazonas?

Jaguaren har et så stærkt bid, at den som den eneste af de store katte dræber sit bytte ved at bide gennem kraniet. Selv skildpadders skjold og kaimaners pansrede skæl kan jaguaren bide igennem! Men jaguaren er blot ét af Amazonas mange ikoniske toprovdyr. I floderne lurer den sorte kaiman, og i sumpene ligger den grønne anakonda klar i baghold. Som toprovdyr er de med til at forme hele Amazonas’ økosystem. I denne episode tager vi dig med på en rejse fra vandet og op i landskabet, hvor du møder tre af Amazonas’ toprovdyr. Du får også indblik i, hvordan de er med til at holde verdens største regnskov i balance – og hvad der sker, når toprovdyr forsvinder fra et område. Så læn dig godt tilbage, og kom med på rejsen ind i toprovdyrenes verden Billeder af  Museum of Veterinary Anatomy FMVZ USP / Wagner Souza e Silva, CC BY-SA 4.0 , via Wikimedia Commons Rum from An Sgurr, Eigg by Jim Barton, CC BY-SA 2.0 , via Wikimedia Commons Kilder Patrick S. Champagne, Thomas B. Herman, Paul Rosolie, Dylan Singer, Dan Horton, Carter J. Payne, Lucy Dablin, David Colville, Julio Cardenas, Miryam Quevedo, Trevor Avery, Renata Leite Pitman, Does the Southern Green Anaconda, Eunectes murinus, seek areas of high prey concentration in southeastern Peru?, Food Webs, Volume 39, 2024,e00348,ISSN 2352-2496, https://doi.org/10.1016/j.fooweb.2024.e00348 [https://doi.org/10.1016/j.fooweb.2024.e00348]. Estes, J. A., Terborgh, J., Brashares, J. S., Power, M. E., Berger, J., Bond, W. J., Carpenter, S. R., Essington, T. E., Holt, R. D., Jackson, J. B. C., Marquis, R. J., Oksanen, L., Oksanen, T., Paine, R. T., Pikitch, E. K., Ripple, W. J., Sandin, S. A., Scheffer, M., Schoener, T. W., … Wardle, D. A. (2011). Trophic downgrading of planet Earth. Science, 333(6040), 301–306. https://doi.org/10.1126/science.1205106 [https://doi.org/10.1126/science.1205106] Terborgh, John & Lopez, Lawrence & Nunez, P.V. & Rao, Madhu & Shahabuddin, Ghazala & Orihuela, Gabriela & Riveros, Mailen & Ascanio, Rafael & Adler, Gregory & Lambert, Thomas & Balbas, Luis. (2001). Ecological Meltdown in Predator-Free Forest Fragments. Science (New York, N.Y.). 294. 1923-6. 10.1126/science.1064397.  Horna, Viviana & Cintra, Renato & Vasquez, Pedro. (2001). FEEDING ECOLOGY OF BLACK CAIMAN MELANOSUCHUS NIGER IN A WESTERN AMAZONIAN FOREST:THE EFFECTS OF ONTOGENY AND SEASONALITY ON DIET COMPOSITION. Ecotropica. 7. 1-11. Caut, S., Francois, V., Bacques, M., Guiral, D., Lemaire, J., Lepoint, G., Marquis, O., & Sturaro, N. (2019). The dark side of the black caiman: Shedding light on species dietary ecology and movement in Agami Pond, French Guiana. PLOS ONE, 14(6), e0217239. https://doi.org/10.1371/journal.pone.0217239 [https://doi.org/10.1371/journal.pone.0217239] Angarita-Sierra, T., & López-Hurtado, C. A. (2020). Exploring the reproductive ecology of the tropical semifossorial snake Ninia atrata. Zoological Research, 41(2), 157. https://doi.org/10.24272/j.issn.2095-8137.2020.015 [https://doi.org/10.24272/j.issn.2095-8137.2020.015] https://www.livescience.com/animals/snakes/never-before-seen-footage-captures-moment-scientists-find-new-giant-anaconda-species-in-amazon [https://www.livescience.com/animals/snakes/never-before-seen-footage-captures-moment-scientists-find-new-giant-anaconda-species-in-amazon] https://www.livescience.com/animals/snakes/how-we-found-the-northern-green-anaconda-a-new-species-of-the-heaviest-snake-on-earth [https://www.livescience.com/animals/snakes/how-we-found-the-northern-green-anaconda-a-new-species-of-the-heaviest-snake-on-earth] https://www.nationalgeographic.com/animals/reptiles/facts/green-anaconda [https://www.nationalgeographic.com/animals/reptiles/facts/green-anaconda] https://www.catsg.org/living-species-jaguar [https://www.catsg.org/living-species-jaguar] https://www.wwf.org.uk/learn/wildlife/jaguars [https://www.wwf.org.uk/learn/wildlife/jaguars] https://bigcatrescue.org/conservation-news/jaguar-facts [https://bigcatrescue.org/conservation-news/jaguar-facts] https://www.iflscience.com/black-caiman-the-amazons-apex-predator-that-hunts-everything-even-humans-74252 [https://www.iflscience.com/black-caiman-the-amazons-apex-predator-that-hunts-everything-even-humans-74252] https://www.iucncsg.org/365_docs/attachments/protarea/06_M-24b37cab.pdf [https://www.iucncsg.org/365_docs/attachments/protarea/06_M-24b37cab.pdf] https://iucn.org/about-iucn [https://iucn.org/about-iucn] https://animaldiversity.org/accounts/Melanosuchus_niger/ [https://animaldiversity.org/accounts/Melanosuchus_niger/] https://www.iucnredlist.org/species/13053/512056 [https://www.iucnredlist.org/species/13053/512056] https://nationalzoo.si.edu/animals/green-anaconda [https://nationalzoo.si.edu/animals/green-anaconda]