 The flammulated flycatcher mostly sings from April to August , which includes its breeding season , and tends to remain hidden while singing . The song of the flycatcher is a plaintive whistle followed by a short but quick roll . It can also give a plaintive and slurred chew call , which is often sung three to five times in a descending series , as well as a squeaky chatter . Calls are the same for males and females and are given throughout the day to give a location , identify an individual , sound an alarm , and mark the limits of a territory , among other functions . During the breeding season , males give what is known as a dawn song every morning , which includes the calls chee @-@ bee beet and churr @-@ r @-@ r @-@ bee bee in alternation . 
