Great Tit (Parus major) Great Tit (Parus major) photo
Nest with clutch easily accessible placed inside a valve of an aqueduct bridge at center of the river.
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Have the parents evaluated the relative inaccessibility of the metal frame by terrestrial predators (mammals and snakes)? but what about aerial ones (kestrel, owls)? nest and parents' movement are visible from far away.


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