Bird Songs, Words to Describe 'em - Working

A 'complex' bird song is made up of one or more phrases?

A song is complex if it has more than one tone, discernable elements and / or different or variable phrases?

A 'confusing' bird song is one that sounds very similar to another species and needs to be studied to be able to tell them apart. lol.

This Yellow-rumped Warbler sonogram shows a one-phrase song. Remember: not all individual Yellow-rumps (aka Butter Butts) sing this song; probably not a good example because of the Myrtle's / Audubon's lumping but a good example of a one-phrased song with a monotonous trill.

Aspects of a song

• pitch
• duration / length
• tempo / speed
• phrase, phrasing
• transition / change to next phrase
• melody
• song type
• voice
• rhythm

Aspects of a phrase

• pitch
• duration / length
• emphasis
• element / part
• pattern

Words that describe the aspects:

• moderate - pitch
• rising / ascending - phrase
• falling / descending - phrase
• pure - tone
• fast - trill
• slow - trill
• piercing - tone, voice
• melodic - voice
• variation - between, within, or of phrases
• thin / weak / soft (quiet) - tone, voice
• strong / loud - tone, voice
• pick-up tone - rhthym

Looking for words to describe the following, and for clarifying all this attempted organization.

• the transition speed between parts of a phrase