Orthetrum sabina sabina (Drury, 1773)

Selected references:

Lepthemis sabina (Drury, 1773);— Selys 1889: 455 (first records from Sumatra: North Sumatra (including Nias) and West Sumatra).

Orthetrum sabina (Drury, 1773);— Ris 1927: 40 (first record from Riau).

Specimens collected. M2b: 1 ♂ (RER20 _ LIB81; BRIN), 16 i 2020; M2e: 1 ♂ (RER23 _ LIB208; UMRI), 10 vi 2023; M3a: 1 ♀ (RER20 _ LIB82; UMRI), 17 i 2020; M3e: 1 ♀ (RER20 _ LIB84; BRIN), 24 i 2020; M7d: 1 ♂ (RER23 _ LIB85; BRIN), 19 ii 2023; M7g: 1 ♂ (RER20 _ LIB83; RER), 23 i 2020; 1 ♂ (RER23 _ LIB86; UMRI), 19 ii 2023; M8a: 1 ♂ (RER20 _ LIB80; RER), 16 i 2020; M10b: 1 ♂ (RER23 _ LIB84; UMRI), 7 ii 2023; M13c: 1 ♂ (RER23 _ LIB334; UMRI), 29 ix 2023; P1e: 1 ♀ (RER23 _ LIB205; BRIN), 30 v 2023; P3b: 1 ♂, 1 ♀ (RER23 _ LIB203–204; RER), in tandem, 30 v 2023; P3c: 1 ♂ (RER23 _ LIB206; UMRI), 30 v 2023; P4a: 1 ♂ (RER23 _ LIB207; BRIN), 31 v 2023; P5a: 1 ♂ (RER23 _ LIB209; RER), 29 vi 2023; P5d: 1 ♂ (RER23 _ LIB332; UMRI), 22 ix 2023; P6e: 1 ♂ (RER23 _ LIB333; BRIN), 23 ix 2023.

Remarks. In addition to the specimen records above, O. sabina was very frequently seen at open drains around the plantations in the Kampar Peninsula, and around muddy pools on and beside roads, often in company with Pantala flavescens (Fabricius, 1798) in the latter situation. On at least two occasions, while sitting in a vehicle behind a lorry loaded with acacia logs, the first author observed O. sabina attempting to perch on the logs while the lorry was moving.