Caiman’s world Pantanal, Brazil

A caiman is an alligatorid crocodilian belonging to the subfamily Caimaninae, one of two primary lineages within Alligatoridae, the other being alligators. Caimans inhabit Mexico, Central and northern South America from marshes and swamps to mangrove rivers and lakes. Caimans have scaly skin, and live a fairly nocturnal existence. They are relatively small-sized crocodilians, with an average maximum weight of 6 to 40 kg (13 to 88 lb) depending on species, with the exception of the black caiman (Melanosuchus niger), which can grow more than 4 m (13 ft) in length and weigh up to 400 kg (880 lb). Caimans are distinguished from alligators, their closest relatives, by a few defining features: a lack of a bony septum between the nostrils, ventral armour composed of overlapping bony scutes formed from two parts united by a suture, and relatively longer, slenderer teeth than those possessed by alligators. The calcium rivets on their scales make their hides stiffer, and thus less valuable, than those of alligators and crocodiles, both of which have a similar appearance but are more pliable. The caimans are predators and, like alligators and the crocodiles, their diet consists of a great deal of fish. The caimans also hunt […]

Capybara’s world, Pantanal, Brazil

The capybara (Hydrochoerus hydrochaeris) is a giant cavy rodent native to South America. It is the largest living rodent in the world. Also called capivara (in Brazil), chigüire, chigüiro (in Colombia and Venezuela), carpincho (in Argentina, Paraguay and Uruguay) and ronsoco (in Peru), it is a member of the genus Hydrochoerus, of which the only other extant member is the lesser capybara (Hydrochoerus isthmius). Its close relatives include guinea pigs and rock cavies, and it is more distantly related to the agouti, the chinchilla, and the coypu. The capybara inhabits savannas and dense forests and lives near bodies of water. It is a highly social species and can be found in groups as large as 100 individuals, but usually lives in groups of 10–20 individuals. The capybara is not a threatened species, but it is hunted for its meat and hide and also for grease from its thick fatty skin. The capybara has a heavy, barrel-shaped body and short head, with reddish-brown fur on the upper part of its body that turns yellowish-brown underneath. Its sweat glands can be found in the surface of the hairy portions of its skin, an unusual trait among rodents. The animal lacks down hair, […]

Violet capped Woodnymph male feeding on Canna indica, Brazil

The violet capped woodnymph (Thalurania glaucopis) is a species of hummingbird in the family Trochilidae. It is found in forest (primarily humid), dense woodland, gardens and parks in south-eastern Brazil, eastern Paraguay, Uruguay, and far north-eastern Argentina (primarily Misiones Province). Violet-capped Woodnymphs inhabit a wide range of habitats from untouched forests, to scrub, to suburban and city gardens. They gather nectar from both native and non-native flowers and also hunt for insects. During certain parts of the year, Violet-capped Woodnymphs migrate short distances. Males have a bluish violet cap and sparkle with dark green above and gold-green below. Females are dark greenish above and off-white below. During the breeding season, these woodnymphs adorn the outside of their nests with ferns and lichen. The violet capped woodnymph Forages for nectar at a great variety of native and introduced plants, from low in understorey to canopy level. The male is distinctive, being overall green with a blue cap and deeply forked dark blue tail. It is occasionally confused with the swallow-tailed hummingbird. The female lacks the blue crown, has entirely greyish-white underparts, and a shorter, white-tipped tail. It is widespread and generally common, and therefore considered to be of Least Concern by […]

Brazilian ruby female perched on Canna indica, Brazil

The Brazilian ruby (Clytolaema rubricauda) is a species of hummingbird found in forest edge, second growth, gardens and parks in eastern Brazil. It is the only species placed in the genus Clytolaema. Although sometimes placed in the genus Heliodoxa, with the brilliants, the Brazilian Ruby is more typically treated as the sole member of a monotypic genus, Clytolaema, one of a great many hummingbird genera described by John Gould. It is common and among the species regularly seen at hummingbird feeders within its range. It is a relatively large hummingbird. Both sexes of this hummingbird are attractive and distinctive. Males are primarily clad in deep green, with a brilliant deep red throat patch, a small but obvious white postocular spot, browner wings, and a bright red tail, while females share the spot behind the eye and the tail color of the male, but are otherwise rich orange over the entire underparts and on the rump. The male is overall green with a coppery back and rump, a coppery-rufous tail and, as suggested by its common name, a highly iridescent ruby throat that can appear black from some angles. Females are green above and cinnamon below. Both sexes have a white […]

Humming bird silhouette, Atlantic rainforest, Brazil

The violet capped woodnymph (Thalurania glaucopis) is a species of hummingbird in the family Trochilidae. It is found in forest (primarily humid), dense woodland, gardens and parks in south-eastern Brazil, eastern Paraguay, Uruguay, and far north-eastern Argentina (primarily Misiones Province). Violet-capped Woodnymphs inhabit a wide range of habitats from untouched forests, to scrub, to suburban and city gardens. They gather nectar from both native and non-native flowers and also hunt for insects. During certain parts of the year, Violet-capped Woodnymphs migrate short distances. Males have a bluish violet cap and sparkle with dark green above and gold-green below. Females are dark greenish above and off-white below. During the breeding season, these woodnymphs adorn the outside of their nests with ferns and lichen. The violet capped woodnymph Forages for nectar at a great variety of native and introduced plants, from low in understorey to canopy level. The male is distinctive, being overall green with a blue cap and deeply forked dark blue tail. It is occasionally confused with the swallow-tailed hummingbird. The female lacks the blue crown, has entirely greyish-white underparts, and a shorter, white-tipped tail. It is widespread and generally common, and therefore considered to be of Least Concern by […]