Black-crowned Night-heron
- Persian name Havasil shab
- English name Black-crowned Night-heron
- Scientific name Nycticoraxnycticorax
- Family Ardeidae
- Morphology Body length:60 cm. They have a black nape and back with the remainder of the body bluish-grey and white belly. Adults have bulky all-black bills.
- Ethology They are more active in the evening and at dawn.
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