In Belgium, Prunus spinosa from Eastern Europe leafs much sooner than its West European counterparts, disrupting the feeding habits of the Thecla betulae butterfly (which feeds on the leaves).
Di Belgia, spinosa Prunus dari Eropa Timur daun lebih cepat daripada rekan-rekan Baratnya Eropa, mengganggu kebiasaan makan Tekla betulae kupu-kupu (yang feed pada daun).