The fingers and the toes bear small terminal discs and are unwebbed.

The dorsum has pale orange-pink ground color and is uniformly spotted.

The ventral surfaces are creamy-white with brown markings; the vent region is suffused by orange-pink.

[2] The male advertisement call is a rapid series of high-pitched cheeps, emitted at a rate of about 10 notes/second for a period of up to 20 seconds.

[2] Copiula pipiens occurs in open secondary woodland slightly above sea level in the Wewak area,[1][2] and in degraded forest on the Yapen Island at 620–680 m (2,030–2,230 ft) above sea level.