Mt Hymettus lacked any Jays until the late 1990s. Then, a huge wildfire burnt most of the forests of Mt Penteli which is a few kms north of Hymettus. It seems that a large part of Penteli's Jays had to relocate. Nowadays, Jays of Mt Hymettus are mostly found in the northern, more wooded, parts. They can find their favourite acorns from the large number of Kerm and Holm Oaks (evergreen bushy oaks).