We love the blackbirds Mr & Mrs's
No idea what's really going on but you know at dusk the Mrs gets really vocal, and then so does he - we imagine it's her telling him it's time to go home, and would he bring some bread, and he says, no, you said you'd get the bread and I'll bring the cheese...or whatever
Or he's saying he's going to have another pint (or equivalent) with his mates, then he'll be home in his own good time
Or she's asking what the kids are up to, and he's telling her to stop babying them, they're just fine on their own now they have proper feathers
Endless entertainment