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  4. » Trithemis annulled ?

 
Trithemis annulled ?...

Libellule e Damigelle 2

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Trithemis annulled ? sent on February 13, 2019 (13:27) by Cosimo Montanaro. 2 comments, 38 views. [retina]

1/160 f/5.6, ISO 100, hand held. Taranto, Italy.

Trithemis annulata ha una lunghezza media di 3,2-3,8 cm e una apertura alare di circa 6 cm. I maschi hanno una livrea rosso-purpurea tendente al violetto, con capo e addome più rossastri e venulazione alare rossa con pterostigmi rosso-brunastri. Le femmine esibiscono una colorazione bruno-chiara e venulazione alare giallastra. In entrambi i sessi è presente una macchia arancione alla base delle ali. Come in molte specie di libellule, il maschio staziona in prossimità dell'acqua in attesa di una femmina. Dopo averla individuata, la afferra per la nuca tramite le appendici poste al termine dell'addome e la induce a curvare la propria estremità addominale raggiungendo gli organi riproduttori del maschio, ricevendo così lo sperma. La femmina depone le uova in acqua, ambiente in cui avviene lo sviluppo delle larve. Frequenta le acque ferme di stagni, laghi, fiumare e canali, dal livello del mare alle quote collinari.



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avatarsupporter
sent on February 13, 2019 (13:48) | This comment has been automatically translated (show/hide original)

A beautiful specimen in a good classic pose, excellent detail of the head, lacks a hair of axis in the tail, but for type of pose is very difficult even considering the diaphragm used ;-)

avatarsenior
sent on February 13, 2019 (15:17) | This comment has been automatically translated (show/hide original)

Thanks Cinzia.
greetings Cosimo. ;-)



Some comments may have been automatically translated with Microsoft Translator.  Microsoft Translator



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