DragonflyPix

Redtail (Ceriagrion aeruginosum)

The Redtail (Ceriagrion aeruginosum) is a damselfly species of the family Coenagrionidae, which contains 30 species in Australia.

The identification key to the family Coenagrionidae consists of 54 couplets, 4 of which are pertinent to Ceriagrion aeruginosum. Click on the numbers on the right to display the corresponding couplets. Or click on the ALLin1 button to see all the relevant couplets together in a single, scrollable window.

#FamilySpeciesCouplet No.
 CoenagrionidaeRedtail
(Ceriagrion aeruginosum)
  • Coenagrionidae: Key couplet 1 of 54

  • ○ Damselflies without this combination of characters
  • b ↑
  • Coenagrionidae: Key couplet 14 of 54

  • couplet drawing
  • ● Anal vein leaving wing margin nearer to or beyond level of Ac
    ● Basal segment of hindwing anal vein, if present, not more than half length of Ac
  • b ↑
  • Coenagrionidae: Key couplet 35 of 54

  • ○ Orange-red to yellowish green damselflies without dark thoracic markings
  • a ↑
  • Coenagrionidae: Key couplet 36 of 54

  • couplet drawing
  • ● Anal vein leaving wing margin at or very close to level of Ac

    ⇒ species: Redtail (Ceriagrion aeruginosum)
  • a ↑
1  
  • Coenagrionidae: Key couplet 1 of 54

  • couplet drawing
  • ● Arculus in hindwing situated beyond distal antenodal crossvein by at least the length of subcostal part of antenodal
    ○ Very small damselflies, hindwing shorter than 14 mm

    ⇒ genus: Agriocnemis
a ↑
b ↓
  • ○ Damselflies without this combination of characters

2  
  • Coenagrionidae: Key couplet 14 of 54

  • couplet drawing
  • ● Anal vein leaving wing margin well basal to the level of Ac in both wings, so there is a basal segment of anal vein about the same length as Ac
a ↑
b ↓
  • couplet drawing
  • ● Anal vein leaving wing margin nearer to or beyond level of Ac
    ● Basal segment of hindwing anal vein, if present, not more than half length of Ac

3  
  • Coenagrionidae: Key couplet 35 of 54

  • ○ Orange-red to yellowish green damselflies without dark thoracic markings
a ↑
b ↓
  • ○ Damselflies with dark brown or black markings on pale background (reddish, yellow, green, blue, pale brown), or substantially dark, the dark areas in either case often with metallic sheen

4  
  • Coenagrionidae: Key couplet 36 of 54

  • couplet drawing
  • ● Anal vein leaving wing margin at or very close to level of Ac

    ⇒ species: Redtail (Ceriagrion aeruginosum)
a ↑
b ↓
  • couplet drawing
  • ● Anal vein leaving wing margin beyond Ac by at least the length of Ac

    ⇒ species: Red-Breasted Longtail (Teinobasis rufithorax)

Australian distribution