I wonder if there's a way of trapping the ladybugs humanely so they can be ferried elsewhere?
That, or your mother's neighborhood has an outbreak of aphids/greenfly/similar and the ladybirds are just cashing in... they're useful little things (unless they're feeding off plants, in which case they're a pest).
no subject
That, or your mother's neighborhood has an outbreak of aphids/greenfly/similar and the ladybirds are just cashing in... they're useful little things (unless they're feeding off plants, in which case they're a pest).