It's much harder to spot the nests. But if you look carefully, sometimes you can find them. Often a sign you're close to a nest is the alarmed noise from the parents, who might also fly away out of the tree. They do this because they think you are a possible predator and want to distract you from looking in the tree.
|A tui nest in the garden|
I found this tui nest in the garden. The female tui builds a nest out of sticks in the fork of a tree. She keeps the nest clean by removing the baby bird's droppings. So another sign of a nest above might be a lots of white bird droppings in one place under a tree. I'm leaving the tui in peace to bring up her chicks and looking forward to seeing the chicks when they leave the nest.
It is easier to find a nest in winter, when storms might reveal old nests. I found this one by a pathway, it must have blown out of a tree. I'm not sure what bird this nest belonged to. Perhaps a sparrow?