Wild tigers are 40% more numerous in the world than previously thought, and their population tiger tigris It appears to be stabilizing or even increasing., even if it remains an endangered species, revealed Thursday, July 21, by the International Union for Conservation of Nature (IUCN). On the other hand, the migratory monarch butterfly, a majestic butterfly capable of traveling thousands of kilometers each year to breed, has joined the IUCN Red List, mainly due to climate change and the destruction of its habitat.
The last assessment of the world’s population of tigers living in the wild was in 2015, and the new census estimated the number of these elegant cats with orange-striped black in fur between 3,726 and 5,578.
jump 40% “It is explained by improvements in tracking technologies, which show that there are more tigers than previously thought and that the number of tigers in the world appears to be stable or increasing”writes the IUCN in an update of its Red List of Threatened Species, which indicates. “Population trends indicate that projects such as the IUCN Integrated Tiger Habitat Conservation Program are effective, and recovery is possible as long as conservation efforts continue.”refers to the organization, which has more than 1,400 member organizations.
However, the tiger is not out of the jungle and remains an endangered species. “Major threats include poaching of tigers, poaching and poaching of their prey, and habitat fragmentation and destruction due to increasing pressures from agriculture and human settlement.”IUCN explains.
To protect this species, it is necessary to expand and link protected areas together, to ensure they are managed effectively and to work with the local communities that live in and around tiger habitats. »
Deforestation, pesticides and herbicides kill butterflies
The migratory monarch butterfly is a subspecies of the monarch butterfly.Danaus plexippus), it has experienced a decline in its population in North America “Between 22% and 72% over the past decade”I noticed. “This Red List update highlights the fragility of nature’s wonders, such as the unique sight of monarch butterflies migrating thousands of miles.”Bruno Oberle, director general of the IUCN, said in a press release.
Logging and deforestation, but also pesticides and herbicides “Killing butterflies and milking, which is the host plant on which monarch larvae feed”IUCN adds. “It hurts to watch monarch butterflies and their extraordinary migration teeter on the brink of collapse”says Anna Walker of the New Mexico Biopark Association, which led the evaluation of the monarch butterfly.
The Western population has declined by about 99.9% since the 1980s, and the Eastern population has declined by 84% between 1996 and 2014. “Whether there are enough butterflies to sustain the population and prevent its extinction remains a concern.”, warns the IUCN. For Anna Walker, ‘There are signs of hope’ In mobilizing the public and organizations to try to protect this butterfly and its habitat.
Twenty-six species of sturgeon are threatened with extinction
The situation of sturgeon – also migratory – has also gone from bad to worse, including that of the beluga, famous for its eggs, from which caviar is made, and for its meat, according to this list. “All sturgeon species are still alive in the northern hemisphere (…) It is now threatened with extinction due to dams and overfishing.once again note the structure.
Of the world’s remaining 26 sturgeon species, 100% are now threatened with extinction, a decline much steeper than previously thought, due to overfishing or impediments to migration.
sturgeon lake (Asepenser Dabrianos) moved from critically endangered to extinct in the wild. The reassessment also confirmed the extinction of the Chinese paddlefish (Psephurus gladius).
The Red List classifies species into one of eight categories of threat. A total of 147,517 species were assessed in the latest edition, with 41,459 species considered critically endangered: among them, 9,065 species are critically endangered, 16,094 are endangered and 16,300 are considered vulnerable. Created in 1964, the Red List includes 902 species that are now extinct and 82 that are extinct in the wild.