A remarkably large number of Rosemary beetles (Chrysolina americana) [1] are already active this spring, in the Rosemary as well as the Lavender (Lavendula angustifolia) like this pair.

Literature
1 Nederlands SoortenregisterChrysolina americana (Rosemary beetle)♀︎♂︎
Lavendula angustifolia (Lavender)A remarkably large number of Rosemary beetles (Chrysolina americana) [1] are already active this spring, in the Rosemary as well as the Lavender (Lavendula angustifolia) like this pair.
Literature
1 Nederlands Soortenregister