For example, when migrating to new nesting grounds, the night herons will often blaze a trail and only when they have settled on a new site will the white egrets follow. Then the white egrets go off hunting during the day while the night herons stay behind to 'mind house' until they change shift in the evening, thereby maintaining a round-the-clock housewatch.
例如：搬遷營巢處，夜鷺往往是開路先鋒，在牠們先住段時間後，白鷺才跟著湧到；白鷺白天出外覓食時，就由夜鷺看家，晚上再換班，形成一個安全的防衛體系。