Tentative de prédation sur Orthetrum stemmale mâle par Polyspilota sp. Lorsque nous prospectons les libellules, nous ne nous contentons pas des odonates et toute forme de vie est intéressante à documenter. Ici, sur le bord d'un sentier forestier, près de grandes flaques d'eau, nous observions un ballet de nombreux odonates attirés par l'eau et la
Ghana - Prédation sur Orthetrum stemmale Lire la suite »
We encountered Sapho bicolor several times, but it proved impossible to approach despite all my attempts; I think it took off as soon as I got within 5 meters of it. And bad luck, I was still using a full frame that day, which makes the subject look even further away. I am very annoyed
Ghana - Sapho bicolor Selys, 1853 Lire la suite »
At first glance, identifying Orthetrum microstigma seems straightforward: you just have to look for its small pterostigmas. That is the theory; the practice, in the field or later on screen, is far more uncertain. Because without direct comparison, estimating that a pterostigma is short is difficult unless you have a lot of experience; remember that
Ghana - Orthetrum microstigma Ris, 1911 Lire la suite »
The male Orthetrum stemmale is apparently very common along forest paths, even though fully pruinose and mature individuals are rarely encountered. And fortunately so, because when they are adorned in blue like this, they are almost indistinguishable from O. brachiale and closely resemble O. julia. Personally, I find that the secondary genitalia under (S2) in
Ghana - Orthetrum stemmale (Burmeister, 1839) Lire la suite »
Orthetrum stemmale mâle est apparemment très commun le long des chemins forestiers, même si on rencontre rarement des sujets complètement pruineux et matures. Et heureusement, car lorsqu'ils sont ainsi vêtus de bleu, ils sont à peu près indifférenciables de O. brachiale et ressemblent beaucoup à O. julia. Et personnellement je trouve que les appareils génitaux
Ghana - Orthetrum stemmale (Burmeister, 1839) Lire la suite »
