Returning in 1967, Zino built a house, employing fishing folk who had been put out of hunting business, and began studying the breeding biology of Cory's shearwaters (Calonectris borealis).

A coup in Portugal in 1974 encouraged the local fishermen to go on a rampage and destroy all the birds and Zino's research station.

This vandalism prompted the government to take up protection of the birds and led to the inclusion of the islands in the Madeira Natural Park in 1986.

Zino managed, by playing calls of the birds to local informants, to rediscover the location of the colony and protect it.

[2] Zino was awarded the Commendador da Ordem do Infante Dom Henrique by Portugal in 1990 and a Certificate of Merit from the UK in 1988.