Long-Tailed Weasel

Long-Tailed Weasel

Bridled weasel, Big stoat, Masked ermine

Kingdom
Phylum
Subphylum
Class
Order
Suborder
Family
Subfamily
Genus
SPECIES
Mustela frenata
Population size
Unknown
Life Span
8 years
Top speed
25
16
km/hmph
km/h mph 
Weight
80-450
2.8-15.9
goz
g oz 
Length
28-42
11-16.5
cminch
cm inch 

The Long-tailed weasel is an endearing-looking species of mustelid common throughout America and southern Canada. Looking like a cute, curious, lively kitten, it is one of nature's most ferocious and relentless predators and is known as "nature's psychopath." Due to the pattern of their hunting and fearless attitude about attacking bigger animals, they are an interesting animal to study. They secure extra prey for future consumption, driven simply by their basic instincts.

Appearance

The eyes of the Long-tailed weasel are black in daylight but glow bright emerald green when caught in a spotlight at night. The summer fur is brown, with whitish underparts and tinged with yellowish or buffy brown. The tail has a black tip. In northern areas, the winter fur becomes white, sometimes with yellow tints, but the tail still has its black tip. The Long-tailed weasel molts two times each year, once in autumn (October to mid-November) and once in spring (March–April). The bottom of the Long-tailed weasel's feet has no fur in summer. Unlike skunks, which spray their musk, the Long-tailed weasel drags and rubs its body over surfaces, to mark their territory and, when scared, to scare predators away.

Video

Distribution

Geography

Long-tailed weasels occupy a wide range, from southwestern Canada south across the United States (except parts of the southwest) then into Central America, Mexico, and South America (Columbia, Venezuela, Ecuador, Peru, and Bolivia). They are found in tropical and temperate habitats in Central and North America. Their habitats range from small wooded areas to crop fields to suburban areas but do not include thick dense forests or deserts. Their nests and burrows are in rock piles, hollow logs, and under barns.

Long-Tailed Weasel habitat map

Climate zones

Long-Tailed Weasel habitat map
Long-Tailed Weasel
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Habits and Lifestyle

These mammals are not social animals and the genders live apart except in the mating season. A male’s home range will overlap those of several females, but those of same-gender adults never overlap. These animals are very aggressive when their home ranges are intruded. They are quick, alert, and agile. They hunt their prey by detecting scent or sound, then follow their victim to attack quickly, killing them with a quick bite at the base of the animal’s skull. Long-tailed weasels may be active in the daytime but are more active during the night. They are known to be noisy, usually in response to a disturbance. This species communicates among themselves through visual, sound, and scent means. Females emit an appealing scent when ready to mate. Sounds and body language are used for communicating when two weasels confront each other.

Seasonal behavior

Diet and Nutrition

The Long-tailed weasels are carnivores. This species mainly eats rodents, but sometimes eats fruits, lizards, and small birds.

Mating Habits

MATING BEHAVIOR
REPRODUCTION SEASON
mid-summer
PREGNANCY DURATION
280 days
BABY CARRYING
6 kits
INDEPENDENT AGE
36 days
FEMALE NAME
bitch, doe, jill
MALE NAME
dog, buck, jack
BABY NAME
kit, pup

Long-tailed weasels are polygynous, which means that one male mates with multiple females. Mating takes place during mid-summer. After copulation, there is a period of delayed implantation, with the egg not beginning to develop until March, the total gestation time being around 280 days. Births are from late April through early May. The average litter size is six. At birth young weigh about 3 grams and have pink wrinkled skin with white fur. After fourteen days, their hair starts to thicken, and size-wise it is easy to tell males and females apart. At 36 days they are weaned and start eating food their mother brings back to the nest. Their mother teaches them how to kill prey and by 56 days they can kill their own prey. Females start to mate during their first summer, and males the following spring.

Population

Population threats

Long-tailed weasels are possibly sensitive to fragmentation of habitat due to agricultural activities, so maintaining landscape connectivity is important for this species. Other threats include the drainage of wetlands and monoculture. They may also be affected both directly and indirectly by the use of pesticides, through effects on habitat, reproduction, and/or food supply.

Population number

Long-tailed weasel is widespread and fairly common throughout its range but no overall population estimate is available. Currently, this species is classified as Least Concern (LC) on the IUCN Red List, and its numbers today remain stable.

Ecological niche

Due to what they consume, Long-tailed weasels help control populations of rabbits and rodents.

Fun Facts for Kids

  • Long-tailed weasels are good swimmers and climbers.
  • These animals have a well-developed sense of sight, hearing, and smell, enabling them to be sensitive and efficient predators.
  • Long-tailed weasels evolved almost 2 million years ago in North America.
  • Long-tailed weasels have such a high metabolic rate that they can eat around 40 percent of their body weight every day.
  • Hungry Long-tailed weasels have no conscience and may kill and eat their siblings or offspring if there is no other food available.
  • In colder parts of its environment, the weasel will use a good deal of its food simply to maintain body heat. To stay warm, it curls up in a tight circle.
  • Unfortunately for weasels, they have been associated with politicians, who are said to "weasel out" of particular situations and use "weasel words" in their public statements, for political gain.
  • In the north part of their range Long-tailed weasels turn white in winter, while in the south their coat is the same color year-round.
  • In North America, Native Americans (in the region of Chatham County, North Carolina) deemed the long-tailed weasel to be a bad sign; crossing its path meant a "speedy death".

Coloring Pages

References

1. Long-Tailed Weasel Wikipedia article - https://en.wikipedia.org/wiki/Long-tailed_weasel
2. Long-Tailed Weasel on The IUCN Red List site - http://www.iucnredlist.org/details/41654/0

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