Evaluation of somatotype in the reticulated giraffe (Giraffa camelopardalis reticulata) using three-dimensional laser measurement

The giraffe that looked fullest was not the one the scanner ranked first. Judging an animal’s condition by eye seems straightforward until its size, thick skin and individual proportions obscure the features being assessed. For zoo giraffes, scales large enough to provide an independent check are not always available.

Nobuhide Kido, Sohei Tanaka and colleagues asked ten staff members at Japan’s Kanazawa Zoological Gardens to score the condition of three reticulated giraffes. They then scanned the animals from both sides with handheld laser devices. Digital models allowed measurements through successive body sections, and the team compared dimensions relative to body length rather than simply declaring the longest animal the largest.

Staff gave one adult female the highest condition score, but another had the largest relative abdominal dimensions in the scans. This disagreement did not prove which giraffe carried more fat: no fat stores were measured, missing scan regions were estimated, and a tape measurement also differed from its scanned equivalent. What the experiment demonstrated was a new way to make body shape explicit and measurable. Instead of relying only on an overall impression, carers could inspect where a giraffe’s outline widened or narrowed and ask what those differences actually represent.