Sentences with word «whiptail»

Since the 1960s scientists have known that some species of whiptail lizards need a male even less than a fish needs a bicycle.

An all - female species of whiptail lizards presents a unique opportunity to test hypotheses regarding the nature and the evolution of sexual behavior

New Mexico whiptail lizards are a species: Aspidoscelis neomexicanus.

Pairs of female whiptails sometimes engage in mock sex, which led to the nickname «lesbian lizards» and seems to encourage the production of egg cells.

Isla San Cosme has three species of reptiles: Aspidoscelis tigris (tiger whiptail), Sauromalus ater (common chuckwalla), and Urosaurus nigricaudus (black - tailed brush lizard).

Asexual whiptails have a special trick for making spermless reproduction work: The egg cells in other animals first double their choromosomes once and then divide twice, leaving them as haploid cells, with half the normal number of genetic material.

This include mammals like the critically endangered mountain pygmy - possum and the brush - tailed bettong (woylie); the endangered northern quoll; as well as the critically endangered Christmas Island whiptail - skink and the vulnerable malleefowl.

Hikers can expect to see a wide variety of fascinating wildlife including the Aruban burrowing owl (Shoco), Aruban rattlesnake, Aruban whiptail lizard, and the Aruban parakeet (Prikichi).

Isla Monserrate has 13 species of reptiles, including the endemic Isla Monserrate whiptail (Aspidoscelis picta).

These sandy bottom sites can be accessed directly from the resort's Dive Centre, where guests can gaze upon colourful corals, whiptail rays, green turtles and possibly even a flamboyant cuttlefish or two!

Like the New Mexico whiptail, bdelloid rotifers are all female and reproduce entirely by parthenogenesis.

As if being able to re-grow a tail isn't cool enough, some species of whiptail lizards (genus Cnemidophorus) have another trick: They can clone themselves.

They were the eggs of a virgin sovereign who would rule over an entirely new race of whiptails, a race in which there would be neither male nor female, only unisex members.

Read about the whiptail lizard, where the speciation process was not quite completed.

But the whiptails» egg cells first double their chromosomes twice and then divide twice, leaving them with the normal number of chromosomes and rendering a sperm cell unnecessary.

Editor's note: This story was updated on November 7, 2017 to correct the credit for the whiptail lizard image.

Adult female New Mexico whiptails reproduce solely through parthenogenesis, laying unfertilized eggs that develop into other female whiptails.

Living in the deserts of the U.S. Southwest and parts of northern Mexico, the New Mexico whiptail is an all - female species of lizard.

The creatures first arose as hybrids between two closely related species of sexually reproducing lizards: the little striped whiptail (A. inornata) and the tiger whiptail (A. tigris).

No sooner had the new sovereign ascended the whiptail throne than the first proclamation was issued: All egg laying will be preceded by a ceremonial pairing with another lizard.

«In case of the whiptail lizard in the New Mexican desert which consists only of females, a type of pseudo-copulation still takes place before eggs start developing, suggesting evolution places certain checks on completely eliminating sex and sexual behavior,» said Prof. Alexander Mikheyev, head of OIST's Ecology and Evolution Unit, the paper's co-author.

Henceforth and forever all whiptails will honor the memory of Whiptail the Tenth and Queen Cnemetail.

We shall never forget how it used to be in the days of our forebears, when every whiptail lived with sex.

Dry leaves collect against the air handlers by the main doorway; whiptail lizards skitter over the concrete paths, and javelinas trot around the grounds at night.

Since then, Crews has used the whiptail lizard to study the evolution of behavior and the neurobiology of gender differences.

After two hours of searching the cactus, aloe, and prickly acacia — sometimes crawling to get a better look at tree trunks and leaf litter — I counted exactly six whiptail lizards, three toads, two geckoes, and one santanero.

In the lizard world, vulnerable creatures that they are, there's the flying dragon, thorny devil, whiptail, Jaragua sphaero, chuckwalla, and so on... all of them possess quite novel approaches to survival, such as the side - flap that gives the flying dragon its namesake, or the thorny devil with a mouth so wide it can consume thousands of ants in a single sitting.