IUCN threat status:

Endangered (EN)

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Biology

Virtually nothing has been recorded of Westfall's knobtail's social, reproductive or feeding behaviour, but certain details can be inferred from what is known about damselflies and dragonflies (Odonata) generally. Odonata species start their life as aquatic larvae or nymphs, passing through a series of developmental stages or 'stadia', and undergoing several moults as they grow. This larval period can last anything between three months and ten years, depending upon the species. Before the final moult (emergence), metamorphosis occurs in which the larvae transform into the adult form. After emergence, adults undergo a pre-reproductive phase known as the maturation period, when individuals normally develop their full adult colour (3). There is often fierce competition between male dragonflies and damselflies for access to reproductive females, and mature males normally establish territories at choice breeding sites along a stretch of river. Females typically begin to lay eggs in water immediately after copulation, often guarded by their mate. However, females of some species can store live sperm in their body for a number of days (3). Odonata usually feed on flying insects and are generalised, opportunistic feeders, often congregating around abundant prey sources such as swarms of termites or near beehives (3).

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Source: ARKive

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