Specimen No. 031 · Bat
Brown Long-eared Bat penis size & anatomy
Plecotus auritus
Reference measurement
Approx. 6.8 mm / 0.27 in
Published average
Study of erected penises: mean 6.840 mm, range 5.180–8.350 mm.
Measurement source: PMC / Biological Journal of the Linnean Society (opens in a new tab)
Did you know?
Brown long-eared bats in the study averaged about 6.8 mm in erect penis length.
Source: PMC (opens in a new tab)
In this species, penis head width correlated with sperm velocity in the study.
Source: PMC (opens in a new tab)
Some bats can store sperm for months, making their reproductive biology especially unusual.
Source: PMC (opens in a new tab)