Fig. 2
From: Is nesting in closed nestboxes advantageous for the European Robin (Erithacus rubecula)?
Dynamics of numbers of European Robin nesting cases recorded in closed nestboxes at three study sites in Lithuania: a site A, b site B, c site C. Note: study periods with low numbers of robins nesting in nestboxes at site A (1997–2020) and site C (2015–2020) are not presented