An Ethogram of Commonly Observed Behaviors of the Endangered Bridled White-eye (Zosterops conspicillatus) in a Zoo Setting

The Bridled White-eye (Zosterops conspicillatus) is a tropical Pacific passerine endemic to the Mariana Island chain. We present an ethogram of the Zosterops conspicillatus saypani subspecies in which we describe the 34 most commonly observed behaviors categorized into the categories sexual, parental, antagonistic, social, maintenance, ingestion/egestion, movement, vocalization, resting behavior, and zoo artifacts. This ethogram may be useful for behavioral studies of the Zosteropidae family and allow taxonomic comparisons. Understanding the behavior of this species might also aid in enhancing conservation efforts. In addition, this ethogram adds to the few behavioral inventories of passerine birds reported so far.