Conservation Status
Not Evaluated (NE)
Scientific Classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Rodentia
Family: Castoridae
Genus: Castor
Species: C. humanoides gigantis
Binomial Name
Castor humanoides gigantis
Common Names
Niichitumi
General Information
Castor humanoides gigantis, commonly known as Niichitumi, is a semi-aquatic, indigenous species prevalent throughout the Canadian Expanse. The name Niichitumi combines the Ojibwe/Anishinaabe word “niichi” (meaning “beaver”) and “tumi” (inspired by the extinct giant beaver species, Castoroides), reflecting their unique heritage and resemblance to bipedal giant beavers.
Physical Characteristics
Niichitumi stand at an average height of 1.9 meters, with some individuals reaching up to 2.2 meters, and weigh between 90 kg and 125 kg. They possess strong jaw muscles and large chisel-shaped incisors that measure 15 to 20 cm. Their hands are equipped with long, dexterous fingers and opposable thumbs, enhancing their manipulative abilities, while their large webbed feet facilitate efficient swimming. Their tails, averaging 27 cm in length, are specially adapted for propulsion in water.
Adaptations
Niichitumi have a multilayered pelt that helps regulate body temperature and provides buoyancy while submerged. They are capable of breath-holding for up to 45 minutes, with typical dives lasting five to six minutes at depths not exceeding 3 meters. During dives, their heart rate can decrease to about 60 beats per minute, optimizing blood flow to the brain. Additionally, they can replace up to 75 percent of their lung air volume in a single breath, a significant adaptation compared to humans.
Reproduction
Males and females are nearly indistinguishable externally, as both share similar sizes and shapes, and their reproductive organs are internal and not readily visible.
Habitat and Culture
Niichitumi are highly intelligent and excel in various cultural and technical fields. They are known for their roles as translators, artists, architects, and builders. Many have been instrumental in constructing the network of layby stations along the Throughway, integrating their technical skills with their natural aquatic abilities.
Notable Individuals
A prominent member of the Niichitumi, Jean le Castor, serves as the Prime Minister of the Canadian Expanse, highlighting the significant contributions and leadership capabilities of this species within their society.
Conclusion
The Niichitumi of the Canadian Expanse stand out not only for their unique physical adaptations that facilitate an aquatic lifestyle but also for their cultural and intellectual contributions to their society. Their ability to blend artistry with functionality in their environmental adaptations showcases the remarkable versatility and resilience of this species.