Heteromys anomalus

Trinidad spiny pocket mouse — © Zveriki.com, derived work based on image based on the original work of John Vaughan Thompson, Creative Commons Attribution-Share Alike 4.0 International

The Trinidad spiny pocket mouse has stiff spiny fur on the back.
Can store seeds for long periods.
Nocturnal.
Well adapted to forest life.
Inhabits Trinidad and northern South America.
Litters contain several young.
Feeds on seeds and insects.
Digs burrows.
Status Least Concern.

年齢

Caribbean spiny pocket mice have a typical lifespan of from 1 to 4 years, although the theoretical maximum lifespan is from 3 years and 7 months to 5 years and 1 month. The species reaches sexual maturity at an age of from 2 to 3 months. During the embryo stage, the developing young are inside the mother. The young spend from 1 day to 1 month and 2 weeks in the nest, where they live and feed on milk from the mother. Following this, the adult stage begins, lasting from 2 months to 3 years and 10 months, during which the species independently forages for food at night and is capable of reproduction.

表現型

Young: Fur—Soft, prickle-free fur in the first weeks. Adult: Size of cheek pouches—Pouches inside the cheeks for carrying and storing seeds and fruits. Adult: Number of dorsal spines—Stiff prickly hairs on the back and sides for protection from enemies. Adult: Tail color—A long tail helps maintain balance during movement.

生理学

The caribbean spiny pocket mouse has a body length ranging from 22 to 29 centimeters and weighs between 41 and 69.2 grams; the adult stage of the species exhibits a body mass from 45 to 85 grams and a body length from 22 to 29 centimeters. The embryonic stage is characterized by a body mass of 1 to 4 grams and a body length of 1 to 3 millimeters, while the juvenile stage displays a body mass of 4 to 25 grams and a body length of 4 to 9 centimeters.

生息地

The caribbean spiny pocket mouse inhabits elevations up to 1.2 kilometers above sea level and is found in tropical dry forests, which are hot with a dry season and deciduous trees, and tropical moist forests that are consistently hot and humid with large trees and vines. The species occupies landscapes including dry land, deserts, semi-deserts, ground forests, ground grassy areas, and scrubland. The climate varies; winters have little precipitation with more rain in summer, or it is hot with little winter rainfall but summer rains, or consistently hot and humid with nearly daily rain, or consistently hot throughout the year with frequent rains but occasional dryness, or consistently very wet with rain almost always and high humidity.

隠れ家

The Caribbean spiny pocket mouse inhabits soil among roots or under fallen tree trunks, utilizing an excavated underground tunnel or chamber for shelter or nesting. The species uses burrows as their refuge, constructing them from soil. These shelters serve multiple purposes, including protection from predators, reproduction, food storage, and rest.

地理

The Caribbean spiny pocket mouse occupies the biogeographical realms of the Neotropics and Palearctic. The species is found in dry forests of Central America, dry forests of Maracaibo, humid forests of Kaketa, humid forests of the Guiana Highlands, humid forests of the foothills of the Guiana Highlands, and humid forests of the Windward Islands.

餌

The mouse mainly feeds on seeds and fruits of plants, occasionally consuming insects; food is collected at night and transported in cheek pouches, with the foraging method involving gathering food with its paws and carrying it in cheek pouches, and the diet consisting of seeds, fruits, insects, and coniferous cones. The feeding strategy involves searching for and obtaining food, with a daily food requirement ranging from 8 g to 18 g; the diet during the "juvenile" stage consists of invertebrates, including beetles, diptera, hymenoptera, butterflies, amphipods, ribbon worms, polychaetes, many-linked worms, bedbugs, orthopterans, dragonfly, and mayfly. Predators (that hunt it) include forest falcons.

繁殖

Caribbean spiny pocket mice inhabit terrestrial environments and develop on land, away from bodies of water; the species reproduces through viviparity, giving birth to live young on land without eggs or larvae. Gestation lasts about one month, after which the female gives birth to a litter of two to six offspring that are born naked and blind. The young develop in a nest built on or near the ground, typically hidden within an underground burrow where only the mother provides parental care. A litter has two to six young, and the interval between reproductive cycles ranges from one month and two weeks to two months and three weeks. The species reaches maturity from two to three months of age; reproduction always occurs through sexual reproduction with fertilization, without generation changes.