Holmes, R. 1960 Erolia alpina 2 July Ikravik, Alaska notes which can just be described as kraa, kraw, kraa...... Sometimes a kraw seems better as a descriptor. This is rather a coarse harsh soundly call. This call may be interrupted by ploors (several seconds where we call in given (as the birds remains in the air) and may be broken by a long, drawn out aerial trill. This trill is usually given when the bird descends to the ground, but at times he pauses my observation awhile and then ends his trill to start to climb upwards where he will again give the kraa note. On the downward trill, the note is not given in a steady sequence. There is often an irregular pulse to the sequence of notes, but in ground the pitch of the trill gradually tapers off as shown below kraa, kraa, kraa...... This is in contrast to baicdi, which has a similar note to the kraw, but it is higher pitched first