Galápagos Tortoise

Galápagos Tortoise

Galápagos giant tortoise

Kingdom
Phylum
Subphylum
Class
Order
Suborder
Superfamily
Family
Genus
SPECIES
Chelonoidis nigra
Population size
10-19 Thou
Life Span
100-170 year
Top speed
0
0
km/hmph
km/h mph 
Weight
136-260
299.2-572
kglbs
kg lbs 
Length
2
6
mft
m ft 

The Galápagos tortoise (Chelonoidis niger) is the largest living species of tortoise. With lifespans in the wild of over 100 years, it is also one of the longest-lived vertebrates. In captivity, these adorable giants can live up to 177 years.

Di

Diurnal

He

Herbivore

Te

Terrestrial

Pr

Precocial

Ov

Oviparous

Aq

Aquatic

Gr

Grazing

So

Social

No

Not a migrant

G

starts with

Lo

Long-Lived Animals
(collection)

Gi

Giant Animals
(collection)

Sl

Slow Animals
(collection)

Appearance

The Galápagos tortoise has a very high brown and light green shell. It blends in very well with its surroundings. It can quickly withdraw its head, legs, and tail into its shell when it is too hot or feels that it is in danger. Its shell is very big and very bony. Galápagos tortoises come in two types: the largest, called ‘domes’, have big, round shells, and live on the larger, wetter islands, and the smaller ‘saddlebacks’, which have a shell that curls up in front the way a saddle does, live on smaller islands that have dry vegetation. The distinctive saddleback shell may enable this tortoise to reach higher vegetation, and this tortoise also has a longer neck and limbs.

Video

Distribution

Geography

Islands
WWF Biomes

The Galápagos giant tortoise inhabits just six Galápagos Islands, of an island chain 1,000 km from the Ecuadorian coast, namely, Isabela, Pinzon, Espanola, San Cristobal, Santa Cruz, and Santiago. The tortoises live in muddy puddles and wallow, preferably in sunny areas. Some may be found at rest under large overhanging rocks. When it is the hot and dry season, these animals tend to go to the cooler highlands, and in the rainy season, they return to the lowlands.

Galápagos Tortoise habitat map

Climate zones

Galápagos Tortoise habitat map
Galápagos Tortoise
Attribution-ShareAlike License

Habits and Lifestyle

Galápagos tortoises generally lead a lazy, peaceful life that centers around eating, wallowing in puddles, or relaxing in the sun. Being cold-blooded, as other reptiles are, they like to warm up by soaking in the sun. At night, they might rest partially submerged in water, mud, or brush to stay warm during cool evenings. Wallowing in mud also serves to keep them cool during the day. These tortoises are very regular with their sleeping, eating, and nesting habits. An individual may shift occasionally inside its range but never moves to a different place. For traveling to feed in the volcanic highlands, this is such a regular habit that paths carved by the passage of thousands of tortoises are built into the landscape. Behavior like this is also a sort of social system because the tortoises travel to the lakes together to swim lazily, always returning in groups. Another very regular habit is nesting. Females return to the exact same place each year to lay eggs.

Seasonal behavior

Diet and Nutrition

Galápagos tortoises are herbivores, eating a range of grasses, leaves, cacti, vines, and fruit.

Mating Habits

REPRODUCTION SEASON
year-round, the peak: January-August
PREGNANCY DURATION
100-200 days
INCUBATION PERIOD
100-200 days
INDEPENDENT AGE
at birth
FEMALE NAME
female
MALE NAME
male
BABY NAME
hatchling
web.animal_clutch_size
2-16 eggs

Little information is known about the mating system in Galápagos tortoises. However, like other tortoise species, they might exhibit polygynous (one male to many females), polyandrous (one female to many males), or polygynandrous (promiscuous) (both sexes have multiple mates) mating systems. Mating is at any time during the year, peaking from January to August. Males generally become territorial in the mating season, at which time rivals stand tall and stretch their necks out to size each other up, with the taller tortoise typically being dominant. 2-16 eggs are laid in a nest that has been dug into sandy ground and then covered over with leaves and soil. The gestation period is 100-200 days. The young dig their way out once they have hatched. They are left on their own, and many of them die during the first few years. Their gender can be determined at 15 years of age. They reach maturity at 20-25 years old and their full adult size when they are 40 years old.

Population

Population threats

When mariners first arrived in the 1600s in the Galápagos Islands they captured these tortoises and kept them alive on ships to eat. Throughout the 19th century, a great number of tortoises were taken by whaling ships for food, others were killed for their oil. Today what threatens them the most are the introduced species: feral cats, dogs, and rats eat juvenile tortoises before their shell has fully developed, and goats and cattle are in competition for vegetation.

Population number

According to the San Diego Zoo Global resource, the total population size of the Galápagos tortoise is around 10,000 - 15,000 individuals. According to the Our Endangered World (OEW) resource, the total population size of this species is around 19,000 individuals, possibly more. The remaining subspecies of tortoise range in IUCN classification from extinct in the wild to vulnerable.

Fun Facts for Kids

  • Las Islas de los Galápagos, meaning the Islands of the Tortoises, were named after the giant tortoises that are found nowhere else on Earth.
  • Tortoises have a poor sense of smell and use their eyes to seek food. Red objects really gain their attention.
  • A Galápagos tortoise has a very slow metabolism, so it can go for a long time without water or food. The longest such time recorded and confirmed was about 18 months. These animals will drink a lot of water when available, to store for later.
  • On arid islands, these tortoises lick morning dew from boulders, and the repeated action over many generations has formed half-sphere depressions in the rock.
  • On some of the Galápagos Islands, finches will clean parasites from the tortoise’s skin while the animal raises itself up onto its legs to help the process.
  • Jokes about tortoises being very slow are based on truth. Galápagos tortoises travel at an incredible 0.16 mph (0.26 km/h). People walk at an average of 2.8 mph (4.5 km/h).

Coloring Pages

References

1. Galapagos Tortoise Wikipedia article - https://en.wikipedia.org/wiki/Gal%C3%A1pagos_tortoise

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