Development of song in the Bengalese finch: Sub song (50 days of age)

Development of song in the Bengalese finch: Sub song (63 days of age)

Development of song in the Bengalese finch: Crystallized song (120 days of age)

Development of song in the Bengalese finch: Plastic song (78 days of age)

Song behavior of a father Bengalese finch

Undirected song behavior of a male Bengalese finch

Courtship behavior of a male Bengalese finch

Courtship and mating behavior of Bengalese finch

Song in the Cave

Song in the Cave

Song of the Sun

The Development of the Train

A solo song of the male gibbon

Snow - print #50 of 52 in the 1936 Calendar of The Chicago Society of Artists

The mastery of English in one hundred days

The Liberal Democratic Party at 50: sources of dominance and changes in the Koizumi era

China survey by the Japan Society of River Development

China survey by the Japan Society of River Development

Chapter 50: Azumaya, series The Fifty-four Chapters [of the Tale of Genji] in Modern Times

Parody of the Third Princess and Kashiwagi: “Chapter 50: A Hut in the Eastern Provinces”

hina survey by the Japan Society of River Development. From the window of a bus

<Seven Places in Salzburg and Berchtesgarden. Arranged accoring to the Seven Days of the Week>: Saturday: Graveyard of St. Peter's in Salzburg

交通事故の年齢階層別発生状況（昭和50［1975］年）

Freehand copy of a transcription of “The Song of Everlasting Sorrow” by Bai Juyi

Growth and development of chicks in the Large-Billed Crow, Corvus macrorhynchos