Male Promachus yesonicus have a white cotton-like bud at the end of their tails, while females do not.
Adults can reach 23–30 millimetres (0.9–1.2 in) in length.
Male Promachus yesonicus have a white cotton-like bud at the end of their tails, while females do not. Adults can reach 23–30 millimetres (0.9–1.2 in) in length.
Promachus yesonicus