2.2
"Morning" song | 1 | 28.6[A]
"Evening" song | 1 | 1.9[A]
----------------------------------------------+-----------+---------
Over-all average rate per minute 6.3

[A] Not sustained; data representative of periods less than 5
minutes in length.

2. Courtship song. It is here termed the "congested" song and is
comparable to the adult "run-on" song mentioned by Nolan (1960:240).
The congested song is a squeaky version of the primary song and is
given when birds are engaged in pair-formation, nestbuilding, and
egglaying. The delivery is rapid and the sound can be likened to that
made by rapidly scraping a bow across a taut violin string. Nolan
(_in_ Mumford, 1952:230) is probably speaking of this song when he
describes a "tuneless" song that "had a jerky, sputtering quality that
characterizes part of the song of the Ruby-crowned Kinglet (_Regulus
calendula_)." More recently (1960:240) he applies the adjectives
"twanging," "Bobolink-like," "bubbling," "jerky," and "squeaky." This
song is often blended with the primary song and is audible for 75
feet.

A specialized version of the congested song is associated with
pre-and post-copulatory display but differs from the typical squeaky
performance in terminating in two ascending notes reminiscent of the
ascending phrase of the primary song.

3. Distress call. It was heard only once, when a captured bird was
being freed from a net. When the bird was almost disentangled it
uttered 10 high-pitched, plaintive notes. The quality of the notes
suggested a relationship to the song phrase rather than to other types
of vocalization. A nesting pair of Bell Vireos, 10 feet away, became
extremely excited when they heard the distress notes. They "scolded"
vigorously and flew around my head at a distance of six feet.

4. Alarm note. This is a specialized, three-note call of the male and
was heard only from the onset of pair-formation through early
nestbuilding. This whinnying, flickerlike call, phonetically
_eh-eH-EH_, each succeeding note of which is louder than the one
before, is given whenever the male is disturbed by an unfamiliar
object. This call is generally succeeded by the _chee_, but
occasionally blends into an extended "whinny," and is typically given
from some perch affording an unobstructed view of the offending
object. The male stretches his neck a