A rare event indeed to see a Song Thrush anymore.
They use to be everywhere, but their population has decreased somewhat in recent years.
Below is a good example why (if you haven't readily noticed any bird activity in an area) you should search extensively with the binoculars.
There is a large clump of hawthorn trees in the Parkland and I spent a little time today watching through my binoculars at the area and I eventually observed this lone Song Thrush.
He was feeding up on Haw Berries that were very plentiful.