Song Thrush . . .

We have a couple of Song Thrushes feeding in our garden but one bird has been killed! Assuming they are a pair, is there any chance if they had babies they will survive with one parent? 

If the nest is deserted will the thrush come back to breed again with a new pairing ? 

Id love advice on creating the perfect habitat to try and keep them . We live next to a farm so there’s lots of shrub, hedging, nesting habitat . I’m hoping to plant some berry bushes and would love to know the type of berries the thrush eats?

Thank you in advance !