84 THE ZOOLOGICAL GARDENS OF EUROPE 



each. Then comes one of the largest flying aviaries I 

 have seen in any Zoological Garden. It is some 50 

 feet high, and has quite large trees growing in it, 

 upon which herons build their nests. The cage was 

 presented by Herr Oskar Aders in 1897, and it con- 

 tains gulls, ducks, ruffs, oyster-catchers, and other 

 waders. 



A BARBAKY RAM, DUSSELDoRF. 



A curious Egyptian building, with outside paddocks, 

 contains camels (two kinds), pigmy cattle, and an Indian 

 elephant. This house is followed by others containing 

 roe deer, axis deer, rabbits, kangaroos, and monkeys. 

 I must not omit to mention a baby Bactrian camel 

 born in the Garden. 



