90 AfNNUAL REPORT SMITHSONIAN INSTITUTION, 1950 



MAMMALS 



Scientific name Common name Number 



Ammotragus lervia Aoudad 9 



Axis axis Axis deer 1 



Bos taurus English Park cattle 2 



Bibos gaurus Gaur 1 



Cephalophus nigrifrons Black-fronted duiker 1 



Cercopithecus aethiops sabaeus X C. a. 



pygeryihrus Green guenon X vervet guenon. 1 



Cercopithecus diana Diana monkey 1 



Cervus nippon Japanese deer 1 



Choeropsis liberiensis Pygmy hippopotamus 2 



Cuniculus paca Paca 1 



^ , J Brown fallow deer 7 



l^j^.^^ j^jj^^ ^^^^ g 



Felis concolor X F. c. patagonica Puma 3 



Hippopotamus amphibius Hippopotamus 1 



Hydropotes inermis Chinese water deer 4 



Hylobates agilis X H. lar pileatus Hybrid gibbon 1 



Leontocebus rosalia Lion-headed marmoset 2 



Mephitis mephitis nigra Skunk 6 



Otocyon megalotis Great-eared fox 3 



Tamandua tetradactyla Tamandua anteater 1 



Taurotragus oryx Eland 1 



Thalarctos maritimus X Ursus midden- 

 dor ffi, (2d generation, 2 litters of 3 each) Hybrid bear 6 



Ajaia ajaja Roseate spoonbill 3 



Chenopis atrata Black swan 4 



Haliaeetus leucocephalus Bald eagle 1 



Leucophoyx thula Snowy heron 2 



Streptopelia tranquebarica Blue-headed ringdove 7 



REPTILES 



Crotalus terrificus Mexican rattlesnake 14 



Constrictor constrictor Boa constrictor 32 



RESEARCH 



Scientific researcli is not set up as a separate activity in the National 

 Zoological Park but is an important part of the operation. The 

 proper care of hundreds of different kinds of animals, some of which 

 have not previously been kept alive, calls for constant observation 

 and study to determine for each one its natural living conditions, likes 

 and dislikes. Usually the most important step is to try foods that 

 will be acceptable substitutes for those that the animals would nor- 

 mally obtain in the wild. Other conditions, such as humidity, tem- 

 perature, type of bedding, types of perch, indeed everything affecting 



