There's This Bird, See...

Mogul's plan for a drilling base on the Indian Ocean island of Chelat meets fierce opposition, because the island is home to a rare flightless bird, the blue rail. When an alternative site is refused, Willy Izard brings in ornithologist Elka Lingstrum to survey the birds, Peter Thornton takes on an unusual assignment, and Brian Stead finds his own aunt, Maud Price, protesting inside his home.