The Persians also built elaborate structures for birds.
Bird dropping might make a mess of elegant architecture, but the bird towers in Iran served to collect the valuable fertilizer they left behind. Very clever.
https://itto.org/iran/attraction/dovecotes-pigeon-tower-isfa...
https://themindcircle.com/mardavij-pigeon-tower/
https://www.tehrantimes.com/news/450802/Pigeon-towers-signif...
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