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Showing posts with the label Lifespan

When Birds Grieve: The Strange Behaviours of Grieving Birds

Birds are often treated as symbols of freedom, instinct, and simplicity—creatures driven by migration, food, and breeding cycles rather than inner emotional lives. Yet anyone who has spent time observing them closely may notice moments that seem to resist that assumption. A quiet stillness around a fallen companion. Repeated visits to a place where a bird has died. Unusual vocalisations, gathering, or agitation in species that are normally quick to move on. These behaviours have led researchers and observers to ask a difficult question: do birds grieve? The answer is not straightforward.  Birds may not experience grief in the human sense, shaped by language, memory narratives, and abstract awareness of death. But in several species—particularly socially complex birds—there is strong evidence of behavioural responses to death that resemble mourning in structure, if not in subjective experience. In the UK, some of the clearest examples come from familiar species such as magpies, crow...

How long do fish live...?

Fish lifespans vary dramatically by species, environment, and care.  Some fish live only a few months, while others can survive for centuries.  Here’s a detailed breakdown: Typical Fish Lifespans by Type • Small freshwater fish (e.g., guppies, tetras) 1–5 years Popular aquarium fish; lifespan depends on water quality and diet. • Goldfish / Koi 10–30 years (common), 40+ years (well cared for) Fancy goldfish ~10–15 years; Koi can reach 50+ years; record koi “Hanako” lived 226 years. • Angelfish / Cichlids 10–20 years In aquariums; larger cichlids may reach 25 years. • Betta / Siamese Fighting Fish 2–5 years Short-lived unless very carefully maintained. • Salmon / Trout 3–8 years Many die after spawning (semelparous species). • Tuna 15–50 years Some large species (e.g., bluefin tuna) can live decades. • Sharks (various species) 20–500+ years - Great white ~70 years- Greenland shark estimated 272+ years (oldest vertebrate) • Deep-sea fish 50–200+ years Cold, low-predator environme...