Temtorialism and Residentiality in a Dragonfly, Orthetrum albistylum speciosum Uhler (Odonata: Anisoptera)1

Although territorial behavior of male dragonflies has been reported by many authors, how long the dragonflies which have acquired their territories remain in their respective established places is not exactly known. From his extensive observations on many dragonfly species, Moore (1952) concluded that marked dragonflies sometimes visited the same place on different days, but found this to be exceptional rather than the rule.