Bactrian camel; two-humped camel
Refers specifically to the two-humped camel species native to Central Asia. Used in zoological and general contexts.
The Bactrian camel inhabits the arid regions of Central Asia.
I saw a Bactrian camel at the zoo.
単峰駱駝 refers to the one-humped dromedary camel, while 双峰駱駝 is the two-humped Bactrian camel.
駱駝 is the general term for camel, encompassing both one-humped and two-humped species.
Compound of 双峰 (sōhō, 'two peaks') and 駱駝 (rakuda, 'camel'). The kanji 駱駝 is a phonetic loan (ateji) from Chinese for the animal.