Advertisement calls of <i>Limnonectes macrognathus</i> (Anura: Dicroglossidae) and <i>Leptobrachium smithi</i> (Anura: Megophryidae), native frog species from Langkawi, Kedah, Peninsular Malaysia

Bioacoustics information is an essential tool for anuran identification, especially within cryptic species. Here we recorded and analysed 17 calls of a male <i>Limnonectes macrognathus</i> individual and 15 calls of a single male <i>Leptobrachium smithi</i>. A <i>Limnonectes macrognathus</i> individual was caught at Gunung Raya on 13 July 2019, and an individual of male <i>Leptobrachium smithi</i> was caught at Lubuk Semilang on 18 January 2019. These species are native of the Langkawi Archipelago. The calls of <i>Limnonectes macrognathus</i> are short trills while <i>Leptobrachium smithi</i> calls have a single high-pitched ‘Kwak’ call. The advertisement call of <i>Limnonectes macrognathus</i> consists of two types that are emitted at a rate of 1 to 4 calls per minute. Each call lasts for 28.18 ± 29.69 (8.45–131.08) seconds (means ± SD (minimum – maximum)). <i>Leptobrachium smithi</i> produced high-pitched calls which consist of an apparent ‘KWAK’ sound. The advertisement call of <i>Leptobrachium smithi</i> consists of a single-note which is emitted 4–6 times per minute. Each call lasts for 0.22 ± 0.01 (0.21–0.23) seconds.