Pseudagrion microcephalum vs Pseudagrion australasiae

Pseudagrion australasiae and P. microcephalum are quite similar to each other, and they occupy the same habitat - exposed grassy pond. However, they could be differentaited by the size, of which P. microcephalum is smaller than P. australasiae. Apart from that, the blue colour of P. microcephalum is brighter than P. australasiae. However, the ultimate confirmation on these two species is very much relied on the structure of their tail (anal appendages). Pseudagrion microcephalum has longer anal appendages compared to P. australasiae.


top is P. australasiae and bottom is P. microcephalum

side view of the anal appendages. Top is P. australasiae and bottom is P. microcephalum