The Round Island day gecko (''Phelsuma guentheri)'', also known commonly as Günther's gecko, is an endangered

species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...

lizard Lizard is the common name used for all Squamata, squamate reptiles other than snakes (and to a lesser extent amphisbaenians), encompassing over 7,000 species, ranging across all continents except Antarctica, as well as most Island#Oceanic isla ...

in the

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

Gekkonidae Gekkonidae (the common geckos) is the largest family of geckos, containing over 950 described species in 62 genera. The Gekkonidae contain many of the most widespread gecko species, including house geckos (''Hemidactylus''), the tokay gecko (''Ge ...

. The species is

endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...

to the islet Round Island,

Mauritius Mauritius, officially the Republic of Mauritius, is an island country in the Indian Ocean, about off the southeastern coast of East Africa, east of Madagascar. It includes the main island (also called Mauritius), as well as Rodrigues, Ag ...

, and typically dwells on palm trees. The Round Island day gecko feeds on insects and nectar.

Etymology

The

specific name Specific name may refer to: * in Database management systems, a system-assigned name that is unique within a particular database In taxonomy, either of these two meanings, each with its own set of rules: * Specific name (botany), the two-part (bino ...

, ''guentheri'', is in honor of

German German(s) may refer to: * Germany, the country of the Germans and German things **Germania (Roman era) * Germans, citizens of Germany, people of German ancestry, or native speakers of the German language ** For citizenship in Germany, see also Ge ...

-born

British British may refer to: Peoples, culture, and language * British people, nationals or natives of the United Kingdom, British Overseas Territories and Crown Dependencies. * British national identity, the characteristics of British people and culture ...

herpetologist Herpetology (from Ancient Greek ἑρπετόν ''herpetón'', meaning "reptile" or "creeping animal") is a branch of zoology concerned with the study of amphibians (including frogs, salamanders, and caecilians (Gymnophiona)) and reptiles (in ...

Albert Günther Albert Karl Ludwig Gotthilf Günther , also Albert Charles Lewis Gotthilf Günther (3October 18301February 1914), was a German-born British zoologist, ichthyologist, and herpetologist. Günther is ranked the second-most productive reptile tax ...

. Beolens, Bo; Watkins, Michael; Grayson, Michael (2011). ''The Eponym Dictionary of Reptiles''. Baltimore, Maryland: Johns Hopkins University Press. xiii + 296 pp. . (''Phelsuma guentheri'', pp. 110-111).

Description

''P. guentheri'' is one of the largest living day geckos. Males can reach a total length (including tail) of about , but often are much smaller. Females of this species are generally very much smaller than males. The body color is grayish or grayish brown. A dark-brown stripe extends from the nostril to above the ear opening. On the back, dark spots may be present. In some individuals, the legs and toes have light-yellow bars. The ventral side is white or yellowish.

Geographic range

''P. guentheri'' originally occurred on Mauritius before rats and cats were introduced. Now, it inhabits only Round Island, north-northeast of Mauritius.

Habitat

''P. guentheri'' is often found on bottle palms, fan palms ('' Latania loddigesii)'', and

Pandanus ''Pandanus'' is a genus of monocots with about 578 accepted species. They are palm-like, dioecious trees and shrubs native to the Old World tropics and subtropics. Common names include pandan, screw palm and screw pine. The genus is classified ...

. Since much of the original vegetation is destroyed, by tropical cyclones, ''P. guentheri'' is forced to live in rocky crevices.

Diet

The Round Island day gecko feeds on various insects and other invertebrates. It also licks soft, sweet fruit, pollen, and nectar.

Reproduction

Adult females of ''P. guentheri'' lay up to four pairs of eggs. The young will hatch after about 58–104 days. The juveniles measure . The eggs are laid normally in June, but can be laid from February to September.

Care and maintenance in captivity

''P. guentheri'' is endangered and was bred and kept by the

Durrell Wildlife Conservation Trust Durrell Wildlife Conservation Trust is a conservation organization with a mission to save species from extinction. Gerald Durrell founded the Jersey Wildlife Preservation Trust as a charitable institution in 1963 with the dodo as its symbol. Th ...

at Durrell Wildlife Park until 1999.