Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
is bipedal
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "is bipedal" is correct and usable in written English.
It can be used to describe an organism or entity that walks on two legs, typically in a biological or zoological context. Example: "The species is bipedal, allowing it to navigate its environment more efficiently than quadrupedal animals."
✓ Grammatically correct
Encyclopedia Britannica
The New York Times
SEP
Alternative expressions(2)
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
3 human-written examples
The saltatorial gait of rabbits is quadrupedal, whereas that of kangaroos is bipedal.
Encyclopedias
Dr. Brunet, the team leader, said the position where the spine entered the head "doesn't prove that he is bipedal, but it shows he could be".
News & Media
In every possible world, every cyclist in that world is bipedal in that world.
Science
Human-verified similar examples from authoritative sources
Similar Expressions
57 human-written examples
All basal dinosauriforms were assumed to be bipedal although evidence for bipedalism is more ambiguous for some taxa, particularly Marasuchus and Plateosaurus.
Science
A variety of modern lizards are bipedal when running.
Encyclopedias
Some species were bipedal, whereas others walked on all fours.
Encyclopedias
All of them appear to have been bipedal.
Encyclopedias
This and other characteristics, they argue, supports the conclusion that this species was bipedal.
News & Media
As for the RSPB and its members, they're bipedal vermin.
News & Media
Did our cave-dwelling forebears feel nostalgia for the days before they were bipedal?
News & Media
Although most crurotarsans were quadrupedal, studies note that some forms, such as Effigia okeeffeae, were bipedal.
Encyclopedias
Expert writing Tips
Best practice
When describing evolutionary adaptations, use "is bipedal" to clearly indicate that an organism's anatomy and physiology are suited for consistently walking on two legs.
Common error
Avoid using "is bipedal" to describe animals that occasionally stand on two legs. The phrase should be reserved for organisms whose primary mode of locomotion involves two legs.
Source & Trust
87%
Authority and reliability
4.1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "is bipedal" functions as a descriptive adjective phrase. It indicates a characteristic of an organism or entity, specifically its ability to walk on two legs. As Ludwig AI points out, the phrase is grammatically sound and commonly used.
Frequent in
Science
33%
Encyclopedias
33%
News & Media
33%
Less common in
Formal & Business
0%
Wiki
0%
Academia
0%
Ludwig's WRAP-UP
The phrase "is bipedal" is a grammatically correct adjective phrase used to describe an organism or entity that walks on two legs. Ludwig AI confirms that it is a standard phrase in English. While relatively rare in general usage, the phrase appears most frequently in scientific, encyclopedic, and news contexts, signifying a formal and descriptive purpose. Alternative phrases include "walks on two legs" or "is two-legged". When using this phrase, ensure it accurately reflects the subject's primary mode of locomotion, avoiding its application to organisms that only occasionally stand upright.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
is two-legged
A more common and simpler way to express the same concept.
walks on two legs
Focuses on the action of walking rather than the state of being bipedal.
capable of bipedalism
Focuses on the capability rather than the current state.
stands upright
Highlights the posture associated with bipedalism.
adopts a bipedal stance
Highlights the act of assuming a bipedal position.
has two legs
Emphasizes the physical attribute of having two legs.
exhibits bipedal behavior
Focuses on the behavior or actions related to bipedalism.
ambulates bipedally
Uses a more formal and technical term for walking on two legs.
utilizes bipedal locomotion
Emphasizes the mode of movement.
moves on two limbs
A more general term that encompasses different types of movement.
FAQs
How to use "is bipedal" in a sentence?
You can use "is bipedal" to describe animals or robots that walk on two legs, such as "The kangaroo "is bipedal", using its tail for balance."
What can I say instead of "is bipedal"?
Alternatives include "walks on two legs", "is two-legged", or "stands upright" depending on the context.
Which is correct, "is bipedal" or "are bipedal"?
"Is bipedal" is used with singular subjects (e.g., "The dinosaur is bipedal"), while "are bipedal" is used with plural subjects (e.g., "Humans are bipedal").
What's the difference between "is bipedal" and "adopts a bipedal stance"?
"Is bipedal" implies a permanent or habitual state of walking on two legs, whereas "adopts a bipedal stance" suggests a temporary or occasional posture.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
87%
Authority and reliability
4.1/5
Expert rating
Real-world application tested