iNat autoID is sugesting Spotted but unfortunately, I did not take a lateral view photo.
Early flying emerald. Hairy secondaries, basal half of front femur is yellow. Appendages are as described in Needham. Note the length of the epiproct. In Kennedy's epiproct is 1/2 length of cerci. Note also the dark face with yellow sides. An odd location for sure, On the windowsill of my mother's house in suburban Nepean.
Exoskeleton by a stream.