How do North American screech owls use duets to strengthen pair bonds?

In North American screech owls, duets serve as a mechanism to reinforce the pair bond through a structured, antiphonal process.1

The interaction typically follows this sequence:

• Initiation: The male begins with a specific song, which the female answers from a distance.1
• Antiphonal Singing: The pair engages in approximately 10 to 15 minutes of alternating calls while moving toward one another.1
• Meeting: Upon converging, the owls switch to a second, distinct duet.1
• Courtship: During the early spring, this vocal interaction may lead to precopulatory posturing and calls, ultimately resulting in mating.1

This behavior highlights the importance of vocalizations in owl mating and social cohesion, as these unique rhythms and pitches allow partners to locate and synchronize with each other effectively.1