With help from the Centra de Primatologia do Rio de Janeiro (CPRJ), a primate research center, four howler monkeys
These researchers observed that howler monkeys
with large hyoid bones in their voice boxes produced loud, low-pitched calls that help to make them seem larger, and therefore more attractive to females.
The taxonomy of howler monkeys
: Integrating old and new knowledge from morphological and genetic studies, in: M.M.
Unsurprisingly, howler monkeys
were absent from the squawking, chirping soundtrack that filtered through our green-tinted, junglethemed plane when I set off for Costa Rica a few days earlier.
While studying primates in Mexico, Dunn heard drastic differences between resident howler monkeys
. He and his colleagues decided to pin down the origin and evolution of this well-known variation among species.
Heterospecific groups of howler monkeys
were detected at Estancia Defesa (29[degrees] 49'04.33"S; 54[degrees] 47'29.97"W; 146 m AMSL), a particular area located in the Pampa Biome, more precisely in the municipality of Sao Vicente do Sul (Fig.
We also went on a boat tour through Tortuguero National Park with Gerardo and his father, who had a talent for spotting sloths in the highest trees, crocodiles and caimans, howler monkeys
, lizards on branches and birds including grebes, cormorants, snowy egrets, toucans and impressive bluethroated herons.
Yellow fever virus strains sequenced in the study and their metadata, Venezuela * Isolate ID Source Location 1A Red howler monkey
Monagas 2A ([dagger]) Red howler monkey
Guarico 3A Red howler monkey
Portuguesa 4A Red howler monkey
Portuguesa 5A Human Portuguesa 6A ([dagger]) Human Portuguesa 7A Human Portuguesa 8A ([dagger]) Red howler monkey
Barinas 9A ([dagger]) Red howler monkey
Apure 10A ([dagger]) Red howler monkey
Monagas Isolate ID Year of Passage GenBank collection history accession no.
Survey and census of howler monkeys
(Alouatta palliata) in the rain forest of "Los Tuxtlas," Veracruz, Mexico.
Larger animals including Howler monkeys
and Woolly Spider monkeys preferred leaves and foliage.
Or, for the more adventurous, one of Chabil Mar's signature tours is always available - a private freshwater excursion past the fishing village of Monkey River to see howler monkeys