 Both adults feed the nestlings and remove fecal sacs , though the female removes far more than the male does . The pair move deceptively when approaching the nest , foraging – or pretending to forage – in nearby vegetation . They stay only a few seconds in any one spot , including at the nest , making it more difficult for a predator to locate the young . The nestlings , which make a rapid , high @-@ pitched peeping call as an adult approaches carrying food , fledge within 10 – 11 days of hatching . 
