Sound recordings for the paper: "A new species of Strix owl from Oman" by Magnus Robb, Arnoud B van den Berg and Mark Constantine, DB 35: 275-310, 2013.

FIGURE 1: Omani Owl / Omaanse Uil Strix omanensis, Al Jabal Al Akhdar, Al Hajar mountains, Al Batinah, Oman (Arnoud B van den Berg/The Sound Approach).

A four-note compound hooting with clear timbre, Pallid Scops Owl Otus brucei faintly visible in background, 04:04, 26 May 2013 (130526.AB.040400/ML163398)

B pulsed hooting with clear timbre, 00:15, 24 May 2013 (130524.AB.001548/ML163396)

C alarm call, 03:15, 26 May 2013 (130526.AB.031500/ML163397)

D contact call, 01:55, 23 July 2013 (130723.AB.015536/ML163399)

FIGURE 2: Omani Owl / Omaanse Uil Strix omanensis, Al Jabal Al Akhdar, Al Hajar mountains, Al Batinah, Oman, 28 April 2013 (Arnoud van den Berg/The Sound Approach).

Five-note compound hooting with hoarse timbre (130428.AB.002745/ML163395). Recorded in territory discovered in April 2013. Bands second from bottom en top are subharmonics, contributing to hoarser sound.

FIGURE 3: Hume's Owl / Palestijnse Bosuil Strix butleri, Wadi Al Mughsayl, Dhofar, Oman (Magnus Robb/The Sound Approach)

A compound hooting of two presumed males, near (left) en far (right), 21:13, 15 april 2010 (100414.MR.211332)

B pulsed hooting of male (2.5 sec onwards, following compound hoot); two series, first consisting of four notes and second largely obscured. In background, contact calls of female, 21:46, 17 April 2010 (100417.MR.214650)

C alarm call at nest, 00:16, 18 April 2010 (100418.MR.001602)

D contact calls of pair. Male gives two higher-pitched calls, 00:16, 18 April 2010 (100418.MR.001602)

FIGURE 4: Hume's Owl / Palestijnse Bosuil Strix butleri, Petra, Jordan, 4 May 2004 (Magnus S Robb/The Sound Approach)

Compound hooting, 23:40 (04.016.MR.12903)