Geraeds, R.P.G., 2000. Observations of the dragonfly (Ophiogomphus cecilia, Fourcroy, 1785) along the river Roer. Brachytron 4(2): 3-7 Ophiogomphus cecilia has always been a rare dragonfly in the Netherlands. It has been extinct since 1936. In 1995 and 1996 several animals were found along the Geleenbeek. Between August 24 and September 9 2 00 Ohe species was seen in low numbers along the river Roer near Melick. Besides, the species was found near the German border south of Vlodrop once. Two females were observed ovipositing. The river Roer appears to be a suitable habitat for this species. Further investigation must make clear if Ophiogomphus cecilia can establish itself in the Roer.

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Rob P.G. Geraeds. (2000). Waarnemingen van de Gaffellibel (Ophiogomphus cecilia) langs de Roer. Brachytron, 4(2), 3–7.