are there animals who commit suicide

Lemmings - at least according to folklore.

The idea of animals committing suicide remains controversial, as it is challenging to determine the intention behind animal behavior. However, there are some instances where animals exhibit self-destructive behaviors or engage in actions that can lead to their death. It's essential to note that these behaviors may not be a conscious decision to end their lives but rather a consequence of other factors, such as illness, stress, or abnormal conditions.

1. Whales and dolphins: Mass strandings of whales and dolphins have been observed, in which multiple individuals beach themselves and ultimately die. Several hypotheses have been proposed to explain this behavior, including navigation errors, illness, or reactions to human-made noise pollution.

2. Bees: When a honey bee stings, its stinger gets ripped out, along with a portion of its abdomen, which results in the bee's death. This self-sacrificial behavior is a defense mechanism to protect the hive from threats.

3. Insects and spiders: Some insects and spiders engage in self-sacrificial behaviors for the benefit of their offspring or colony. For example, a female redback spider may actively position herself to be consumed by her mate during copulation, increasing the male's investment in the mating process and potentially benefiting her offspring.

It's crucial to understand that these examples do not necessarily imply that animals consciously choose to end their lives as humans might perceive the concept of suicide. Animal behavior is often driven by instinct and specific environmental factors, making it difficult to determine their intent.