Algemeen

Dahl's Toad-headed Turtle Threatened with Extinction

A recent study published in Conservation Genetics by researchers from the Universidad de los Andes, Universidad Nacional de Colombia, WCS (Wildlife Conservation Society), and the Turtle Survival Alliance (TSA) shows that the Dahl's Toad-headed Turtle (Mesoclemmys dahli), a rare reptile found only in Colombia, is threatened with extinction. The Dahl's Toad-headed Turtle lives in small bodies of water, streams, and small aquifers.

Three Australian Lizards Declared Extinct In The Wild

There is some bad news coming out of Australia’s Christmas Island, as three native lizard species, Lister's gecko (Lepidodactylus listeri), the blue-tailed skink (Cryptoblepharus egeriae) and the Christmas Island forest-skink (Emoia nativitatis) have been downgraded by the International Union for the Conservation of Nature, from critically endangered, to extinct in the wild. The IUCN released its annual Red List of of endangered species December 5 in Tokyo.

The Resilience of the Bee Hive

Neonicotinoid insecticides are based on the natural toxin nicotine, and are of particular concern because they bind virtually irreversibly to the nicotinic-acetylcholine receptors in the insect’s nervous system. Many observations show that the longer the exposure time, the less amount of total chemical is needed to kill the insects; in other words, the lethal exposure concentration decreases with exposure time.

Insect decline: the biodiversity of the entire world is at stake

Bees and butterflies are experiencing widespread population decline, creating public concern in recent years. Data collected in Germany suggest that it’s not just bees and butterflies at risk: insect populations overall have plummeted by more than 75 percent since 1989. Scientists have known about the population decline for several years. However, they didn’t know how many species were declining, and they didn’t expect it to be happening so fast.

The Lizards of Pennsylvania Depend on Insects

In Pennsylvania, there are 21 native species of snakes, 14 species of turtles and four species of lizards. Here's a description of the four lizards that are native to Pennsylvania. The northern fence lizard (Sceloporus undulatus hyacinthinus) is part of a group commonly known as spiny lizards. It grows to 4-7 inches in length, and spends much of its time in the branches of trees. Insects, and sometimes snails, make up the diet of the northern fence lizard. The species is found in open woodlands across the southern two-thirds of Pennsylvania.

Die Liste der bedrohten Tiere und Pflanzen im Emsland ist lang

Kiebitze (Vanellus vanellus) gehören zu den absoluten Verlierern, sagt Jutta Over vom Nabu Emsland/Grafschaft Bentheim. Sie sind im Jahr 2017 im Emsland kaum noch zu sehen und stehen wie fast die Hälfte der 140 Brutvogelarten auf der Liste der gefährdeten Arten. Over hat für unsere Redaktion zum heutigen Tag des Artenschutzes eine Liste bedrohter Tiere und Pflanzen im Emsland erstellt. Von den 140 Brutvogelarten im Emsland seien fast die Hälfte auf der Roten Liste Niedersachsens als gefährdet eingestuft, sieben davon sogar vom Erlöschen bedroht.

Tumor-Erkrankung bedroht Schildkröten

Durch ein Herpes-Virus erkranken immer mehr Schildkröten an der sogenannten Fibropapillomatose. Dabei wachsen den Reptilien Tumore. Die Krankheit ist seit den 1930er-Jahren wissenschaftlich beschrieben. Seit den 1990er-Jahren beobachten Forscher eine weltweite Verbreitung. Weltweit gibt es sieben Meeresschildkrötenarten, die in subtropischen und tropischen Gewässern leben. Sechs von ihnen führt die Weltnaturschutzunion IUCN auf ihrer Roten Liste.

Diese 5 Arten sind in der Schweiz unmittelbar vom Aussterben bedroht

Die Artenvielfalt innerhalb der Tierwelt sieht sich auf dem ganzen Globus einer beträchtlichen Gefahr ausgesetzt: Gemäss aktuellen Erkenntnissen der Weltnaturschutzunion sind von den rund über 63'000 wissenschaftlich erfassten Arten um die 15'000 vom Aussterben bedroht - Tendenz steigend. Auch in der Schweiz werden gefährdete Rassen auf einer roten Liste geführt, um die 500 Tier- und Pflanzenarten sind darauf zu finden.

These are tough times to be a snake

The International Union for Conservation of Nature finds that 28 percent of reptiles are currently threatened with extinction. Though snake populations are notoriously difficult to assess, in the United States alone there are 14 snake species listed by the U.S. Fish & Wildlife Service as threatened or endangered. A 2010 study in the Royal Society journal Biology Letters found snake populations across five countries in widespread decline.

Canada’s wildlife are in trouble

The Living Planet Report Canada, published today, is the most comprehensive synthesis of Canadian wildlife population trends ever conducted. It shows that on average from 1970 to 2014, half of monitored vertebrate wildlife species in the study suffered population declines. Of those, average decline is 83 per cent since 1970. The picture is also worrisome for Canada’s federally protected species. Since 2002, when the Species at Risk Act became law, federally listed at-risk wildlife populations declined by 28 per cent, the report shows.