98 NEW YORK ZOOLOGICAL SOCIETY 
$7,700, and the new dens were located against a ledge of rock 
facing the original series. These dens were erected and com- 
pleted to the satisfaction of the Society in December, 1911, and 
will be occupied early in the spring of 1912. 
Eagle and Vulture Aviary—On February 15, 1911, a con- 
tract for an extensive and thoroughly modern aviary, suitable 
for eagles and vultures, was awarded to George Hildebrand, in 
the sum of $18,867. Work began on February 15, 1911, and was 
very nearly completed by the end of the year. The new aviary, 
which will be fully described in subsequent publications, contains 
seven very large cages, and six smaller ones—all carefully 
designed to serve to the best purpose the various species that 
they are to contain. This fine improvement adds a feature of 
great interest to Bird Valley, and greatly strengthens the series 
of installations for the exhibition of birds. 
Zebra House.—In the spring of 1911, a contract for the con- 
struction of a spacious and thoroughly modern Zebra House, in 
keeping with the other animal buildings of the Zoological Park, 
was awarded to Joseph Balaban, in the sum of $25,181, and the 
work of construction began immediately. The yards were not 
included in the contract, for the reason that at the time the 
eontract for the building was made, a fund for the construction 
of the yards had not been appropriated by the city. Later on, 
an appropriation for the construction of the yards, and the walks 
around them, was secured, and this work will be undertaken very 
early in the spring of 1912. At the latest, the Zebra House and 
adjacent yards should be ready for occupancy by July 1, 1912. 
Respectfully submitted, 
WILLIAM T. HORNADAY, 
Director. 
