Pigeons are notoriously bad at building nests, because they don’t have to good like other birds.they are descendants of Rock Doves (kewl name for a band) and like their ancestors the just need a flat surface and are use to dealing with meager building materials. They use what they have for a “good enough for me” nest and pigeons being almost everywhere in the world means their nests do just fine.
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Thank you 🥲