A Northern Saw-whet Owl vocalized (mostly, but not exclusively the tuut
... tuut .... tuut song) virtually every night and morning twilight from
various locations right around our house and small barn from January 15
through April 12th this year. The last week of that period the
vocalizations were irregularly paced and also included some of the
various screech and wail calls. I took that change to have something to
do with breeding or nesting.
Now, after 25 days of silence, a Saw-whet this morning at 4:24am gave
its regular early morning twilight tuut ... tuut ... tuut song from its
familiar location just east of the house.
That would be just about exactly the right length of time for the
incubation and hatching of nestlings. (They must be preciously cute!)