Blackbird with yummy food

 The blackbirds have young in the ivy. 

Every time when father blackbird goes to the nest to feed the young, he announces his coming  by singing a short song before he goes to the nest. As if he wants to tell the young he's coming again with delightful yummy food. Even with a beak full of crawly things he is able to sing...without dropping a crumb.

I never have seen that, that a blackbird tells his young he is coming...