''Hyloxalus pulchellus'' is a species of

frog A frog is any member of a diverse and largely semiaquatic group of short-bodied, tailless amphibian vertebrates composing the order (biology), order Anura (coming from the Ancient Greek , literally 'without tail'). Frog species with rough ski ...

in the family

Dendrobatidae Poison dart frog (also known as dart-poison frog, poison frog or formerly known as poison arrow frog) is the common name of a group of frogs in the Family (biology), family Dendrobatidae which are native to tropical Central America, Central an ...

from the

Andes The Andes ( ), Andes Mountains or Andean Mountain Range (; ) are the List of longest mountain chains on Earth, longest continental mountain range in the world, forming a continuous highland along the western edge of South America. The range ...

of northern

Ecuador Ecuador, officially the Republic of Ecuador, is a country in northwestern South America, bordered by Colombia on the north, Peru on the east and south, and the Pacific Ocean on the west. It also includes the Galápagos Province which contain ...

and southern

Colombia Colombia, officially the Republic of Colombia, is a country primarily located in South America with Insular region of Colombia, insular regions in North America. The Colombian mainland is bordered by the Caribbean Sea to the north, Venezuel ...

Distribution

''Hyloxalus pulchellus'' is found in the inter-

Andean The Andes ( ), Andes Mountains or Andean Mountain Range (; ) are the longest continental mountain range in the world, forming a continuous highland along the western edge of South America. The range is long and wide (widest between 18°S ...

páramo Páramo () may refer to a variety of alpine tundra ecosystems located in the Andes Mountain Range, South America. Some ecologists describe the páramo broadly as "all high, tropical, montane vegetation above the continuous timberline". A narrower ...

s of northern

and adjacent southern

( Nariño, Cauca, and

Putumayo Department Putumayo () is a departments of Colombia, department of Southern Colombia. It is in the south-west of the country, bordering Ecuador and Peru. Its capital is Mocoa. The word ''putumayo'' comes from the Quechua languages. The verb ''p'utuy'' ...

s) and on the eastern slopes of the Andes from southern Colombia south in Ecuador to the headwaters of the

Pastaza River The Pastaza River (, formerly known as the SumataraEnock, Charles Reginald (1914) ''Ecuador: its ancient and modern history, topography and natural resources, industries and social development'' Charles Scribner's sons, New Yorkpages 177–178 ) ...

. Its altitudinal range is

asl American Sign Language (ASL) is a natural language that serves as the predominant sign language of Deaf communities in the United States and most of Anglophone Canada. ASL is a complete and organized visual language that is expressed by employ ...

; at the higher end of this range it is the only frog species of this kind. The frog's range includes many protected parks: Parque Nacional Sumaco Napo-Galeras, Reserva Ecológica Antisana, Parque Nacional Llanganates, Reserva Ecológica Cayambe-Coca, Bosque Protector Sierra Azul, and more in Colombia.

Description

Males measure and females in

snout–vent length Snout–vent length (SVL) is a morphometric measurement taken in herpetology from the tip of the snout to the most posterior opening of the cloacal slit (vent)."direct line distance from tip of snout to posterior margin of vent" It is the mos ...

. Dorsum is dark brown with diffuse greenish tint. It has an oblique lateral stripe extending to eye, cream with iridescent golden tint in colour and sometimes edged with brown or black.

Behaviour

Male frogs call in or from under grass. The call is a buzz emitted 72 times during 4 minutes.

Habitat and conservation

Its natural

habitat In ecology, habitat refers to the array of resources, biotic factors that are present in an area, such as to support the survival and reproduction of a particular species. A species' habitat can be seen as the physical manifestation of its ...

s are dry and humid montane forests. It is threatened by

habitat loss Habitat destruction (also termed habitat loss or habitat reduction) occurs when a natural habitat is no longer able to support its native species. The organisms once living there have either moved elsewhere, or are dead, leading to a decrease ...

, possibly also climate change and

chytridiomycosis Chytridiomycosis ( ) is an infectious disease in amphibians, caused by the chytrid fungi '' Batrachochytrium dendrobatidis'' and '' Batrachochytrium salamandrivorans''. Chytridiomycosis has been linked to dramatic population declines or extinc ...

. It has disappeared from many sites in Ecuador but remains common in Colombia. The IUCN classifies this frog as near threatened. It suffers from habitat loss associated with the construction of human habitation and roads, logging, and the introduction of non-native predatory fish. There was a large die-off of these frogs during the 1990s, but it is uncertain what caused it. Climate change and the fungal disease

are the two main possibilities.

References

{{Taxonbar, from=Q611317 pulchellus Amphibians of the Andes Amphibians of Colombia Amphibians of Ecuador Amphibians described in 1875 Taxa named by Marcos Jiménez de la Espada Taxonomy articles created by Polbot