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Gray Whale and Monarch Butterfly Face Extinction with Dropping Population


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Researchers have raised the alarm over the drastic drop in the population of gray whales off the West Coast of the United States. According to the researchers, the sudden drop in gray whales population by almost one-quarter since 2016 closely mimics similar die-offs close to 2 decades ago.
NOAA Fisheries reported in a paper released last Tuesday that surveys counted at least 6,000 fewer migrating gray whales last winter, i.e. 21,000 compared with up to 27,000 in 2016.
(Photo : Silvana Palacios)
Scientists Still in the Dark About Cause of Die-offs, Attribute Causes to the Environment
According to the agency, there is a strange mortality event which occurred in 2019. Dozens of gray whales were washed up on the beaches of the Pacific Ocean. Scientists have not been able to put the finger on what is causing this substantial die-off. ....

Granite Canyon , United States , James Wheeler , Silvana Palacios , Pacific Ocean , Xerxes Society , West Coast , Dark About Cause , Attribute Causes , Endangered Species List , Baja Peninsula , Northern California , Marin County , San Diego County , Pacific Northwest , Debunks Migration Mortality As Major Cause , Butterfly Monarch , Monarch Butterfly , Population Decline , கிரானைட் பள்ளத்தாக்கு , ஒன்றுபட்டது மாநிலங்களில் , ஜேம்ஸ் சக்கர வாகனம் , சில்வானா பாழசிோஸ் , பெஸிஃபிக் கடல் , ஐயர்க்ஸீஸ் சமூகம் , மேற்கு கடற்கரை ,

Butterflies create jet propulsion with a clap of their wings, study shows | Life


Wednesday, 20 Jan 2021 11:51 AM MYT
This handout picture taken in June 2018 released on January 19, 2021 by the Lund University shows a Silver-washed fritillary butterfly close to the Lund University field station Stensoffa, outside Lund, in Southern Sweden. AFP pic
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PARIS, Jan 20 The whimsical, wafting flight of butterflies may not give the impression of top aerodynamic performance, but research published yesterday suggests their large flexible wings could be perfectly designed to give them a burst of jet propulsion.
Scientists at Lund University in Sweden set out to verify a decades-old theory that insects “clap” their wings together, squeezing out the air between with such force that it thrusts them forward. ....

France General , Lund Stensoffa , Lund University , Scientists At Lund University , Per Henningsson , Insect Study , பிரான்ஸ் ஜநரல் , லண்ட் பல்கலைக்கழகம் , விஞ்ஞானிகள் இல் லண்ட் பல்கலைக்கழகம் , பூச்சி படிப்பு ,