was reduced to Greater Bombay and Thane until his warden status was cancelled. As the game warden, he nabbed poachers, helped police officers file First Information Reports, and helped curb the sale of jackal and fox tails as decorative items. The Act was later modified to draft the Wildlife Protection Act, 1972. Borivali National Park During his tenure as the Honorary Secretary of the BNHS, Humayun proposed that the forest areas located north of Aarey Milk Colony in Bombay up to the Vasai Creek be designated as a national park. These areas would include the wilderness around Tulsi lake and Vihar lake, and the Kanheri Caves. The 100-square-kilometre area was notified as the Borivali National Park by the government of India in the 1960s, and was renamed as the Sanjay Gandhi National Park in 1981. In 1975, the Government of Maharashtra started work on the construction of a highway that ran through the park, despite protests from environmental organisations and groups. Along with a few other members of BNHS, Humayun filed a Public Interest Litigation (PIL) petition in the Bombay High Court for halting the construction of the highway. The court ordered a stay on the construction of the road and work on the road was never restarted subsequently. Ban on the export of frogs' legs His work on frogs in agricultural ecosystems helped in the imposition of a ban by the Indian government on the export of frogs' legs. In the early 1960s, Humayun learnt about the commercial export of the legs of the bullfrog (Rana tigrina) from India to be used as a delicacy. He was of the opinion that the frog, which ate insects and acted as a pest control, should not be eaten in the interest of preserving ecological balance and avoiding the use of chemical pesticides such as DDT. Humayun wrote to the editor of the Science Reporter, published by the Government of India, and to government bodies, trying to draw attention to the dwindling number of bullfrogs owing to export. In 1969, he referred the matter to the erstwhile Chief Minister of Maharashtra, Vasantrao Naik, who asked him to formally present the matter so that it could be examined. However, these efforts drew a blank. A few years later he discussed the export of frogs' legs, and its probable impact on agriculture in Konkan and elsewhere, with Dr D.N. Srivastava, the then Assistant Director