At dawn and at sunset the howler monkeys
screamed together and the parrakeets broke into shrill chatter, but during the hot hours of the day only the full drone of insects, like the beat of a distant surf, filled the ear, while nothing moved amid the solemn vistas of stupendous trunks, fading away into the darkness which held us in.
Population density of the mantled howler monkey
(Alouatta palliata) at La Selva Biological Reserve, Costa Rica: a new technique to analyze census data.
Police found a rare owl buzzard, a marmoset, a howler monkey
as well as the skulls of an Australian fur seal and loggerhead turtle.
It'll be much quieter in the house from here on in, with only Jayne's dulcet tones (think: a howler monkey
with its fingers in a sausage mincer) to liven things up.
Allomaternal care in the black howler monkey
Apartment supervisor, Ed Dimas said: "We alerted the environmental agencies when the howler monkey
first appeared close to the buildings.
First record of Cebidicola semiarmatus (Phthiraptera: Trichodectidae) on the red howler monkey
, Alouatta guariba clamintans (Primate: Atelidae) in Brazil
Because these Pavarottis of the howler monkey
world had less trouble attracting and creating an exclusive harem of females, they tended to have smaller testicles.
In this area, the Primate Order is only represented by two confirmed species: Alouatta palliata aequatorialis Festa, 1903 (Ecuadorian mantled howler monkey
) and Cebus albifrons aequatorialis Allen, 1914 (Ecuadorian capuchin monkey).
A recent article by journalist Lindsay Fendt, of The Tico Times, an English-language news site based in Costa Rica, suggested that the rain deficit may also be playing a role in an apparent die-off of howler monkeys
. A conservation group called Paso Pacifico collected evidence of nearly 300 howler monkey
deaths in Nicaragua in just the first three months of the year.
Caption: In nine species of howler monkey
, researchers found an inverse relationship between testes size and size of the hyoid bone, part of the vocal tract.
Distribution of the black howler monkey
(Alouatta pigra) and the mantled howler monkey
(Alouatta palliata) in their contact zone in eastern Guatemala.