A group of animals or insects that move from one region to another, usually in search of food or breeding grounds.

प्रवासी झुंड

English Usage: The migratory swarm of birds flew south for the winter.

Hindi Usage: प्रवासी झुंड के पक्षी सर्दियों के लिए दक्षिण की ओर उड़ गए।