THE ANIMAL FILES

Alpaca

Vicugna pacos

Chewing cud does not imply a cow's stomach layout.

Alpacas process forage through a three-compartment stomach and repeated chewing. Their fleece comes in two familiar forms, while humming is one of several sounds heard within a herd. Fibre, digestion and communication each provide a concrete way to recognise the domestic camelid.[1]

Follow the evidence ↓
Alpaca
Image: Christophe Meneboeuf · Commons · CC BY-SA 2.5
Three compartments
The camelid stomach has three compartments.[1]
Locks and crimps
Suri and Huacaya differ in fleece form.[1]
A humming herd
Humming occurs in several contexts.[1]

Three compartments

The first two compartments provide sites of anaerobic fermentation, and later processing continues through the third. Alpacas chew cud, but their stomach anatomy differs from that of four-chambered true ruminants. Similar feeding actions can occur in differently organised digestive systems.[1]

Locks and crimps

Suri fleece grows in straighter locks, whereas Huacaya fibre has a crimped, wavy form. These are domestic breed distinctions based on fibre, not separate wild species.[1]

A humming herd

Mother and young hum, and humming also occurs in other social or unsettled situations. Snorts and sharper calls add to the repertoire. One sound alone is not an exact emotional label; observation of companions and the surrounding event helps interpret it.[1]

A COMMON MIX-UP

Does chewing cud prove an alpaca has four stomach compartments?

No. Camelids have a three-compartment system with their own anatomy.[1]

TRY A LITTLE REASONING

Why should fleece type not be treated as a different animal species?

Reveal the explanation

Suri and Huacaya are breed categories within the domestic alpaca, distinguished by fibre traits.[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 — Alpaca (cited revision)
  2. NCBI Taxonomy — Vicugna pacos

Last fact check:

One discovery leads to another

Bactrian camelTwo humps store energy, not drinking water.Camelus bactrianus ↗DromedaryThe hump stores fuel, not a flask of drinking water.Camelus dromedarius ↗LlamaLong ears, padded toes and a newborn ready to stand.Lama glama ↗