The black stream glider (Trithemis festiva),[2][3][4][5] also known as the indigo dropwing[3][4][5] is a species of dragonfly in the family Libellulidae.

[1][6] Black stream glider is a medium-sized dragonfly with purple color on its body structure.

The eyes are dark brown above, with a purple colored tinge, which is bluish grey, lateral and beneath.

The abdomen appears bright yellow with medial, lateral and ventral stripes, colored black, however, the medial and lateral black stripes form a confluence at abdominal segments to enclose a wedge-shaped yellow spot.

[7][3][4][5] This dragonfly is commonly seen and has been mostly observed near slow flowing streams and canals, accompanying dense forest ranges.