Entoma
Blue-tailed forest hawk, Orthetrum triangulare, plate

Skimmers

Orthetrum triangulare

Blue-tailed forest hawk

Unlike many of its relatives, this dragonfly breeds in small forest pools and marshy hill streams rather than open ponds, and tolerates a fair amount of disturbance.

WhereHill streams across South and East Asia
Size29 to 33 mm abdomen length
WhenApril to October

The thorax is black with a broad apple green stripe on each side, and the abdomen is azure blue on the middle segments while the first two and last three segments stay black. The eyes are dark blue and the face is dark.

It breeds in small ponds and marshy pools linked to hill streams in forested country across South and East Asia, and is more tolerant of habitat disturbance than many forest dwelling dragonflies in the same family.

Traits

Habitat

Woodland

Colour

Black, Blue, Green

Active

Day

To people

Not aggressive towards people; safe to observe at close range.

Activity through the year

Often confused with

Orthetrum pruinosum

Abdomen deep violet red with pruinescence concentrated near the base, rather than the extensive azure blue seen across most of the abdomen in the Blue-tailed forest hawk.

Questions

Is the Blue-tailed forest hawk dangerous to people?

Not aggressive towards people; safe to observe at close range.

When can you see the Blue-tailed forest hawk?

The Blue-tailed forest hawk can be seen from April to October, by day.

Plate retouched from a photo by Name, CC BY 4.0, iNaturalist Licence

Report a mistake in this entry

Dragonflies and damselflies›Skimmers›Orthetrum

Last updated 2026-09-27. Every entry is checked against published sources.