Why is the red berries on a yew bush a problem?

The red berries on a yew bush are problematic because they contain toxic compounds called alkaloids, particularly taxine alkaloids, which can be harmful or even fatal to humans and animals if ingested. While the fleshy part of the berry is not toxic, the seed inside is highly poisonous. This poses a risk, especially to pets and livestock, as they may accidentally consume the berries. Awareness of this toxicity is crucial for safe landscaping and gardening practices.