Posted by: Rebecca Whitham, Editor Video and photos by: Jeremy Dwyer-Lindgren It is music to our ears to hear newly paired siamangs Sam and Briony developing their sweet duet together. We caught a few notes of their very first outdoor song. Video: Siamang pair sings first duet notes at Woodland Park Zoo. High in the canopy, this treetop symphony at once strengthens the bond between the pair of siamangs and declares their territory to others in the area. The song can be heard from over a mile away even in our urban environment and, as they develop their tune, the bouts may last up to 20 minutes. How do they project their voices so far? Those ballooning throat sacs act like a resonating chamber and amplify the sound. Briony’s tune with her former long-time mate Simon was known by not just zoo visitors, but also neighbors in Phinney Ridge, Fremont and Wallingford, all within earshot of their morning song. Hearing the treetops come to life in siamang song once