Brazilian three-banded armadillo

Brazilian three-banded armadillo
A Brazilian three-banded armadillo at Edmonton Zoo
Conservation status
Vulnerable  (IUCN 3.1)[1]
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Cingulata
Family:	Dasypodidae
Genus:	Tolypeutes
Species:	T. tricinctus
Binomial name
Tolypeutes tricinctus (Linnaeus, 1758)
Geographic range

The Brazilian three-banded armadillo (Tolypeutes tricinctus) is an armadillo species endemic to Brazil, where it is known as tatu-bola (Portuguese pronunciation: [tɐˈtu ˈbɔlɐ], lit. ball armadillo). It is one of only two species of armadillo (the other is the southern three-banded armadillo) that can roll into a ball. It has suffered a 30% decline in population in the last 10 years.

Habitat

The Brazilian three-banded armadillo lives primarily in open savannahs and dry woodlands, where low rainfall and poor soil limit the vegetation to tall, woody grasses, scattered bushes, and gnarled trees. There is an abundance of cactus-like plants in the northern reaches of its range.^[2]

Range

As its name suggests, the Brazilian three-banded armadillo is indigenous to Brazil, living primarily in the eastern part of the country, just south of the equator. They are rarely seen west of 50°W longitude.^[2]

Diet

The main staples of its diet are ants and termites, which it can smell through up to eight inches (20 cm) of soil. It finds food by shuffling slowly along with its nose to the ground. When it detects prey, it frantically digs a hole and thrust its nose into it, using its long, sticky tongue to lap up any insects it may find. Other foods include mollusks, worms, fruit, and carrion.^[2]

Anatomy

Brazilian three-banded armadillos weigh approximately 3.5 lbs (1.5 kg). They typically have a combined head and body length of 14–18 inches (35–45 cm) and a 2.5–3.5-inch (6–8-cm) tail, giving them a total length of 16.5–21.5 inches (41–53 cm). The armor is composed of ossified dermal scutes covered by nonoverlapping, keratinized epidermal scales, which are connected by flexible bands of skin. This armor covers the back, sides, head, tail, ears, and outside surfaces of the legs. The underside of the body and the inner surfaces of the legs have no armored protection, and are covered instead by long, coarse hair. The genus Tolypeutes, which includes both the Brazilian and southern species of three-banded armadillos, is unique in the ability to roll up in a tight, almost impenetrable ball. This is because their armor is slightly looser than that of other armadillo genera, which allows for greater freedom of movement. The loose armor also creates a layer of air between the shell and the body, which insulates the animal. This higher capacity for thermoregulation allows them to survive in climates too arid for some of the other armadillo species. When the armadillo rolls into a defensive ball, the ears are tucked into the shell and the head and tail interlock to seal the shell completely. The teeth are soft and peg-like, adapted solely for smashing the exoskeletons of insects.^[2]

Behavior

Armadillos are chiefly solitary, but this species will occasionally travel in small family groups of up to three members. They are largely nocturnal, but have been known to forage during the day. All armadillos are spectacular diggers, but unlike most of the other species, three-banded armadillos do not dig in defense or to find shelter. They prefer to rest under bushes, rather than dig burrows, and their ability to roll into a ball makes defensive digging unnecessary. When they are not foraging, they move with a sort of trot, bouncing on the tips of their front toes, while their hind feet slap flatly on the ground. They mark their territories with secretions from glands on their face, feet, and rump. When threatened, they occasionally do not seal their armor completely, but wait until they are touched. They then quickly snap shut in an effort to startle the predator.^[2]

Reproduction

The mating season lasts from October to January, during which there is a brief courtship before mating. The female carries the young for a gestation period of 120 days at the end of which single, blind offspring is born. The newborn’s armor is soft, but its claws are fully developed, and it can walk and roll into a ball within hours of birth. The armor hardens by the third or fourth week, around the same time the eyes and earflaps open. The young armadillo is weaned at 10 weeks and reaches sexual maturity at 9–12 months.^[2]

Threats

The defense system of the Brazilian three-banded armadillo makes it safe from the majority of predators. Adult pumas are the only South American animals powerful enough to be a natural threat. The real danger to armadillos is the destruction of their habitats to make room for livestock.^[2]

2014 World Cup mascot

The Caatinga Association, a Brazilian environmental NGO, launched in January 2012 a national campaign proposing the three-banded armadillo to become mascot of the 2014 World Cup. In March 2012, the Brazilian weekly, Veja, reported the three-banded armadillo would be the official mascot for the 2014 World Cup hosted by Brazil. Official announcement came in September 2012.^[3]

References

Wikimedia Commons has media related to Tolypeutes tricinctus.

Wikispecies has information related to: Tolypeutes tricinctus

• Infonatura
• Gardner, A. (2005). Wilson, D. E.; Reeder, D. M, eds. Mammal Species of the World (3rd ed.). Johns Hopkins University Press. p. 99. ISBN 978-0-8018-8221-0. OCLC 62265494. 
• Wildlife Explorer: Three-Banded Armadillo. USA: International Masters Publishers, 1998.
• World Cup Mascot.