What has eaten my pink foxglove flowers

Question

White colour has been left alone; it’s just the pink flowers eaten away leaving stem and bud cap.

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Answer 1

Slugs will eat the flowers at night then hide during the day. You can trap them by placing half an orange or grapefruit rind face down near the plants. In the morning collect and dispose of the slugs. Slug pellets also can be purchased.

https://www.gardeningknowhow.com/ornamental/flowers/foxglove/foxglove-flowers.htm