Sørblåvannymfe

Sørblåvannymfe
Hannen.
Foto: Tobias Knab
Nomenklatur
Coenagrion puella
(Linnaeus, 1758)
Populærnavn
sørblåvannymfe[1]
(sørlig blåvannymfe)
Klassifikasjon
RikeDyr
RekkeLeddyr
KlasseInsekter
OrdenØyenstikkere
UnderordenVannymfer
FamilieBlåvannymfer
Økologi
Habitat: i tilknytning til ferskvann
Utbredelse: Europa, Nord-Afrika og vestlige Asia
i det sørøstlige Norge langs kysten vest til Rogaland.

Sørblåvannymfe (Coenagrion puella) er en vannymfe som tilhører familiegruppen blåvannymfer (Coenagrionidae).

Utbredelse

Sørblåvannymfe er utbredt i Europa og Nord-Afrika, østover til Sentral-Asia. Finnes i Danmark, og det sørøstlige Sverige og Finland. I sørøstlige Norge langs kysten, vest til Rogaland.[1]

Utseende

Kjønnene er ulike. Hannen har en karakteristisk tegning på det andre bakkroppsleddet. Hunnen utseende varierer.

Vingene holdes taklagt bak på kroppen i hvile. Vingespennet er mellom 32 og 50  millimeter.

Levevis

Nymfen lever i næringsrike dype vann i lavlandet, med rik vegetasjon.

Eggene legges på vannplanter, vanligvis under vannlinjen. Utviklingen tar 1-2 år. Nymfen overvintrer på vegetasjonen eller ved røttene. De voksne (imago) vannymfene finnes vanligvis ikke langt fra stedet der de levde som nymfe.

Flygetiden er fra mai til august.

Sørblåvannymfe har ufullstendig forvandling, overgang fra nymfe til det voksne kjønnsmodne insektet går gradvis gjennom flere hudskift (nymfestadier). Nymfene lever i vann og ligner derfor lite på de voksne (imago), bortsett fra størrelsen. Når nymfen kommer til det siste hudskiftet finner den et strå eller noe, der den kan klatre opp over vannflaten. Her blir den hengende, mens huden revner på ryggsiden. Den nyklekte vannymfen blir hengende på den gamle huden, eller like ved siden av, helt til den nye huden er noe herdet, og vingene har fått sin endelige form.

Bildegalleri

  • Hannen kjennes på den karakteristiske tegningen på andre bakroppsledd. Foto: James K. Lindsey
    Hannen kjennes på den karakteristiske tegningen på andre bakroppsledd.
    Foto: James K. Lindsey
  • Paringshjul. Foto: Friedrich Böhringer
    Paringshjul.
    Foto: Friedrich Böhringer
  • Lunsjpause
    Lunsjpause

Referanser

  1. ^ a b «Artsdatabankens artsopplysninger». Artsdatabanken. 26. juli 2020. Besøkt 26. juli 2020. 

Kilder

  • Holmen, M. & H. Pedersen. 1995. Odonata i Danmark, foreløbig status 1995. Nordisk Odonatologisk forum. Vol 2, side 4
  • Sahlén, Göran. 1996. Sveriges Trollsländor. Feltbiogerna. 165 sider. ISBN 91-85094-43-9

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