priya || bsp
Uday || kolkata
With the establishment of the Zoological Society of London in 1826, utility of zoos was realized but even then animals continued to be kept in cages. In 1907, Carl Hagenback developed the concept of barless moated enclosures and this concept of display of animals influenced the managers of zoos around the world. In place of smaller cages, spacious enclosures came into being that also helped in maintaining the biological and psychological need of the captive animals.