why do city birds bring cigarette butts to their nests 🐦🚬 Did you know? Some are using build 😳 Researchers say nicotine helps repel parasites 🐛 — protecting baby birds in the short term. But ⚠️ City birds keep surprising us,

City birds keep surprising us, and this habit is one of the strangest yet. Some species now tuck used cigarette butts into their nests, and the reason may be brutally practical. According A bird is raising it's babies in a cigarette bucket at my workplace : r mildlyinteresting Why is a bird picking up cigarette butts?, Not addiction. Survival., Some city birds use cigarette filters in their nests because nicotine kills parasites., This behavior is called City birds use cigarette buds in their nests as pesticides?, Sources:, 1) Urban blue tit nests and cigarette butts: accidental litter or adaptive behaviour? (Animal Behavior), 2) Incorporation of Urban birds using Cigarette Butts in nests: A study has surprisingly found House finches and House sparrows, for example, often using cigarette butts into their nests. Studies highlighted in Nature show that

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