The Alpine black salamander is the animal with the longest gestation period, lasting up to 3 years and 2 months. Following this species, which animals also have similarly long gestation periods?
“Gestation period” is known as the time required for a fetus to develop inside the mother’s uterus, starting from fertilization to the postpartum period. In animals, gestation periods vary among species, although smaller animals generally have shorter gestation times. Fetal size is also one of the factors affecting the gestation period. Let’s explore the Top 10 animals with the longest gestation periods in the world.
1. THE ALPINE BLACK SALAMANDER – ABOUT 2 TO 3 YEARS
Known as an amphibian living in the Central and Eastern Alps. Depending on the altitude of their habitat, their gestation period lasts from two to three years. They have a lifespan of about 10 to 20 years. Generally, at an altitude of 650–1,000 meters above sea level, gestation lasts two years; at an altitude of 1,400–1,700 meters, the gestation period lasts about three years (1,140 days).
Image of the Alpine black salamander
2. AFRICAN ELEPHANT – ABOUT 645 DAYS
Like its Asian cousin, the African elephant also endures a fairly long pregnancy. In fact, it is the species with the longest pregnancy cycle, lasting up to 645 days. Along with a high lifespan, its gestation period is also recorded as extremely long (nearly 2 years).
3. SPERM WHALE – ABOUT 480 TO 590 DAYS
The sperm whale is the largest toothed whale, so it is no surprise that its gestation period lasts from 480 to 590 days. Female sperm whales reach sexual maturity at age 9, and it can take up to 19 months for them to produce a calf.
These animals live in small groups called “social units”. Specifically, units of females and calves live separately from mature males. Within these units, females cooperate to protect offspring and assist each other with nursing. They give birth once every three to six years, and the period of caring for offspring can last for over 10 years.
Image of sperm whale
4. WHALES AND DOLPHINS – ABOUT 510 DAYS
Whales and dolphins are known as highly intelligent marine mammals with complex social behaviors and gentle temperaments. They can carry pregnancies for about 40 months (more than 4.4 times that of humans), which is considered a record. However, whales typically have a gestation period of 10 to 18 months.
5. WALRUS – ABOUT 456 DAYS
A female walrus begins ovulating between 4 and 6 years of age, and the gestation period of these massive creatures can last 456 days. A unique feature is that during the first four months of pregnancy, the embryo undergoes delayed implantation before embedding into the walrus’s uterus. This special mechanism allows the calves to develop fully and be born more easily.
6. BLACK RHINOCEROS – ABOUT 450 DAYS
Normally, a mature female black rhinoceros gives birth for the first time at 4 years of age and has a gestation period of up to 450 days. At this time, pregnant rhinos will search for a safe place to give birth so that their offspring can come into the world peacefully. Regarding reproductive age, females mature at 4 to 6 years, while males take longer, from 7 to 9 years.
7. GIRAFFE FROM 420 TO 460 DAYS
A newborn giraffe can already reach a height of up to 1.8 meters, so it is no surprise that a giraffe’s gestation period can last from 420 to 460 days. They usually give birth to a single calf, but occasionally give birth to twins.
The duration of a giraffe’s pregnancy is about 15 months. At this time, the mother giraffe often returns to the place where she was born to give birth to her own offspring.
Image of giraffes
8. CAMEL – FROM 360 TO 420 DAYS
The gestation period of a camel can range from 360 to 420 days, and the average birth weight of a calf ranges from 35 to 40 kg. Other camelids, including llamas, also have a gestation period of about 330 days.
The average lifespan of this animal is 45 to 50 years. The height of a mature camel is 1.85 m at the shoulder hump and 2.15 m at the top hump. Their running speed reaches up to 65 km/h in low shrubland and can maintain speeds up to 65 km/h. The body weight of a two-humped camel ranges from 300 to 1,000 kg, while a one-humped camel weighs between 300 and 600 kg.
9. ZEBRA – FROM 361 TO 390 DAYS
Zebras can carry a pregnancy for 361 to 390 days, although this can vary among different species. For instance, Grévy’s zebra can have a gestation cycle lasting up to 438 days.
10. DONKEY – ABOUT 365 DAYS
The gestation period of a female donkey, also known as the golden period, usually lasts 365 days; however, this can sometimes vary between 11 to 14 months. Females typically give birth to only one offspring, and twins are extremely rare.
These interesting facts about the top 10 animals with the longest gestation periods in the world will help expand your knowledge and understanding of the animal kingdom.