THE ANIMAL FILES

Dromedary

Camelus dromedarius

The hump stores fuel, not a flask of drinking water.

The dromedary has one hump, padded feet and protective eyelashes. Surviving dry conditions involves several linked features: storing fat, conserving water and controlling heat. Its flexible lips also let it browse vegetation that can be thorny and sparse.[1]

Follow the evidence ↓
Dromedary
Image: Garrondo · Commons · CC BY-SA 3.0
Hump
Stores fat as an energy reserve[1]
Feet
Two toes with broad, padded support[1]
Diet
Leaves, shrubs, grasses and desert plants[1]

Stored energy on the back

Fat in the hump can be metabolised when resources are scarce. This is different from storing liquid drinking water in a container. Water economy also depends on kidney function and limiting unnecessary water loss.[1]

A face for dusty meals

Thick eyelashes and bushy eyebrows help protect the eyes from dust and sand. The nostrils can close. Mobile lips grasp leaves and other plant material, including thorny foods. Browsing shrubs and trees is important; the animal is not simply a grass-eater that happens to live in sand. Available plants differ between regions.[1]

Two toes and a broad pad

Each long leg ends in two toes and a broad, leathery pad. These surfaces support the animal’s weight, although slippery mud is less suitable for its feet. The dromedary moves the legs on one side together in its characteristic gait.[1]

A COMMON MIX-UP

Is the hump a water tank?

No. It is a fat reserve; water conservation involves other physiological features.[1]

TRY A LITTLE REASONING

Why would describing only the hump miss how the eyes cope with a sandstorm?

Reveal the explanation

Fat storage addresses energy supply. Eyelashes and eyebrows offer separate physical protection against airborne sand and dust.[1]

Sources & editorial notes

Adapted and translated from the cited Wikipedia revisions, with source-linked reasoning. Image credit and licence are listed separately above.

Adapted and translated from Wikipedia contributors; exact revisions are linked below. CC BY-SA 4.0

  1. Wikipedia contributors — Camelus dromedarius (adapted and translated; exact revision)
  2. NCBI Taxonomy — Camelus dromedarius (identity and game lineage)

Last fact check:

One discovery leads to another

Bactrian camelTwo humps store energy, not drinking water.Camelus bactrianus ↗LlamaLong ears, padded toes and a newborn ready to stand.Lama glama ↗AlpacaChewing cud does not imply a cow's stomach layout.Vicugna pacos ↗