Young Starlings may look like Blackbirds…
However, as an adult New Zealand Starling they look like what I have in these photos. Here is one in the thumbnail of a persimmon tree.
The Black bird here can be a Black, Black bird which is a male Black bird and the brown Black bird is a female Blackbird or it could be a juvenile Black bird.
I once mistook a Black bird for a Thrush and I was completely wrong.
Every country has different types of Starlings, Blackbirds and Thrushes and so that is OK.