who observed abundance and behaviour patterns of all birds seen at five different sites from February 2005 to September 2006, finding 105 different species and estimating an average resident population of 36,595 per square km.
who observed abundance and behaviour patterns of all birds seen at five different sites from February2005 to September 2006, finding 105 different species and estimating an average resident populationof 36,595 per square km.