They call them mamushi, or the Japanese pitviper. New research determines whether these snakes operate in chilly weather, or if their prey are safe to relax. 
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Main Paper References:
Kodama T, Mori A. 2023. How important is temperature for strike success of ectotherms? Thermal effects on predator–prey interactions of free‐ranging pit vipers (Gloydius blomhoffii). Ethology:eth.13400. DOI: 10.1111/eth.13400.
Species of the Bi-Week:
Lawson LP, Loader SP, Lyakurwa JV, Liedtke HC. 2023. Diversification of spiny-throated reed frogs (Anura: Hyperoliidae) with the description of a new, range-restricted species from the Ukaguru Mountains, Tanzania. PLOS ONE 18:e0277535. DOI: 10.1371/journal.pone.0277535.
Other Mentioned Papers/Studies:
Kimbrough L. 2023.No croak: New silent frog species described from Tanzania’s ‘sky island’ forests. Available at https://news.mongabay.com/2023/02/no-croak-new-silent-frog-species-described-from-tanzanias-sky-island-forests/ (accessed April 12, 2023).
Editing and Music:
Podcast edited by Emmy – https://www.fiverr.com/emmyk10 
Intro/outro – Treehouse by Ed Nelson
Species Bi-week theme – Michael Timothy
Other Music – The Passion HiFi, https://www.thepassionhifi.com