Synlestes tropicus is a species of Australian damselfly in the family Synlestidae,[3] commonly known as a tropical needle.

[4] It is endemic to north-eastern Queensland, where it inhabits streams in rainforests.

[5] Synlestes tropicus is a large to very large damselfly, coloured a metallic green-black with pale markings.

It perches with its wings partially or fully outspread.

[6]