Emilia's pygmy flying squirrel has been reported from dense forest in Sarawak, Borneo. The genus account describes these squirrels as tree-living, nocturnal gliders.
Animal Diversity Web identifies this as the smallest flying squirrel and gives an average mass of 27 g. Members of Petaurillus have a gliding membrane along the sides of the body.
The Petaurillus account describes members of the genus as tree-living and nocturnal, eating fruit and seeds and gliding between trees. P. emiliae itself is reported from dense forest in Sarawak.
An extinction-risk assessment has not been added yet.