Male or Female?

I got a photo (not to bad ) of my thrush, I was just wondering if you can tell if its male or female, I know I have two vist my garden but only see one now, it maybe that they come one at a time. they don't both land in the garden at the same time, one eats while the other watches. they seem to get on well with my blackbirds and will eat together on the table, they even eat with the starlings.

Hey farmer, farmer, put away the D.D.T now. Give me spots on my apples, but leave me the birds and the bees, please!