Relatively common. They're summer visitors only. Much rarer than starlings or house sparrows, but not rarer than, for example, great spotted woodpeckers. They search for places with high trees for hide and fruit trees for eat, overall cherry trees, mulberry trees and fig trees (such as in the photo). They're very easy to hear, with very distinctive calling, but extremely difficult to see as they always pass the time in the high and dense trees. This pair visited my garden repeatedly in summer days, eating on the figs of the fig tree. However I needed to take the photo through binoculars from a window: if I appear in the garden, the orioles quickly would fly away, they're very shy birds.