The phrase "average body length" is correct and usable in written English.
It can be used in contexts such as biology, zoology, or any field where measurements of organisms are discussed.
Example: "The average body length of the species is approximately 30 centimeters."
Alternatives: "mean body length" or "typical body length".
A new record was set for the smallest vertebrate animal by a Lilliputian frog with an average body length of only 7.7mm.
They found that with the two susceptible species, average body length increased and the size of the jaw opening, or gape, decreased at a steady rate over the years.
The average body length of S. javus collected at site A was 156.6 mm (SD = 9.4) in March and 102.9 mm (SD = 44.6) in September.
The 29 smallest species (with the smallest having an average body length of just 7.7 millimeters) are spread across five families and 11 genera (Rittmeyer et al. 2012).
The team compiled average body length data from other researchers' field studies for adult female cetaceans, because females are the larger sex, of nearly all 84 living cetacean species.
Average body length in males is 130-260 mm, while females average 114-204 mm.
The average body lengths of the sampled fish were highly correlated with the maximal body lengths reported in the literature (r = 0.96, n = 4; see also Table 1).
Although Fig. 1C depicts the evolution of mean female and male size (under squared change parsimony), all statistical tests used log (mean body length = average of minimum and maximum values) corrected via independent contrasts [32] using the PDAP module [33] in Mesquite [34].
For example, eight wild specimens examined from Mongolia showed an average head and body length of 80 mm, an average hind foot length of 13.5 mm, and an average tail length of 5 mm.
Males are usually larger than females, having an average head and body length of 652 mm, a 258 mm tail and an average weight of 8 kg.
