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Its appearance is similar to the western, and eastern tiger swallowtails, but has narrower black stripes and usually two tails on each hindwing (rather than only one). Most two-tails have a black "slit pupil" in the orange eyespot on each hindwing, never present in western tiger.
The tiger has been listed as Endangered on the IUCN Red List since 1986 and the global tiger population is thought to have continuously declined from an estimated population of 5,000–8,262 tigers in the late 1990s to 3,726–5,578 individuals estimated as of 2022. [1]
For example, the cat's slit pupil can change the light intensity on the retina 135-fold compared to 10-fold in humans. [20] However, this explanation does not account for circular pupils that can be closed to a very small size (e.g., 0.5 mm in the tarsier) and the rectangular pupils of many ungulates which do not close to a narrow slit in ...
Experts with World Wildlife Fund also told CNN in 2021 there were more captive tigers in the United States than in the wild. Only about 6% of those tigers were kept at accredited zoos, with the ...
On International Tiger Day, take a deeper look at the struggle these iconic and endangered big cats face all around the world.
List of largest cities by area Notes ^ For urban/metropolitan areas that have more than one core city , the figure for their city proper should use either the most populous one (e.g. Dallas for Dallas–Fort Worth metroplex ) or the best-known one (e.g. Manila for Metro Manila , instead of Quezon City ).
The tigress named Chelsea was being treated for kidney disease, zoo officials said.
Several species of Felidae (cats) and snakes have vertically elongated (slit) pupils, advantageous for nocturnal ambush predators as it helps them to estimate the distance to prey in dim light; diurnal and pursuit predators in contrast have round pupils. [30]