The parents keep visiting the nestbox. They even display courtship behaviour like head-bow-low and eechupping. And the male is digging bowls. This is perfectly normal behaviour and is seen at all nestsites. It is kind bonding behaviour, and a ritual of the end of the reproduction season. They confirm to eachother: we belong together, this is our scrape, we will nest together the next time. They even copulate, and this is bondong behaviour as well. Which is very unusual, because copulations are usually just for reproduction.
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