I analyzed the several acoustic sounds of Japanese Crested Ibis Nipponia nippon which is one of the species in danger of extermination in the world, by means of sound spectrograph (Rion SG-07). The acoutic sounds of so-called Kinchan (female) in the cage (Toki Hogo Center, Sado, Niigata Pref. Japan) and of the breeding one in China were compared with several sonagrams shown by the pattern of 7.2 second (2.5KHz). Dement'ev (1969) reported that voice of Japanese Crested Ibis resembles croaking of Raven, but it was, in fact, much louder, and it may be expressed as "ka-ga, ka-ga, ka-ga" and sometimes as "kag, kag, kag". In this study, I recorded three kinds of different sonagrams of Kinchan (Kwá, kwáu and Kwá-n) and four kinds of sonagrams in China (Kwá, kwa-u, Kwan and Kwá-n). The sonagrams of Kwa-n in Kinchan and those in China are said to be similar sounds, but it is clear that both sonagrams are somewhat different from each other.
On 22 September 1982, a Pallas's Warbler Phylloscopus proregulus was obtained in the Sea of Japan off the coast of Iwanai in Hokkaido. In our country this species has only been observed on 21 April 1964 on Tsunoshima Island in Yamaguchi Prefecture. The speciman in this short comunication is classified to Phylloscopus proregulus. We consider that the main migration route of this subspecies is formed in the inside of the eastern Asia including the coastal area. The Pallas's Warbler obtained seemed to be strayed from the main migration route to sea by a strong wind from the low pressure.