This comes out if you feed the birds wild bird seed. They eat a lot of seeds. I don’t always do that but see the odd Greenfinch now and then.
The Greenfinch is slightly smaller than a Sparrow. These were introduced to the South Island and Auckland. These birds became a pest eating fruit and garden fruit, but as the market gardens decreased and dairy cattle and sheep took over, they decreased. They will fly a long way to go to an environment that feeds them.
Both mother and father build the nest, but the mother incubates the eggs alone, the father feeds the mother and the chicks with reguritated seeds.