This is a paid asset, but now you can download Fly Particle System for FREE, but please remember this package is provided only for learning purposes or to be able to test before buying the product, NOT FOR COMMERCIAL PURPOSES.
Detail this asset from Unity Store: Original Link
Fly Particle System v1.0.1 (Latest version)
• Shuriken Particle System
• Texture sheet animation
Insect particle system with animated sprites that will add life to your scene.
Upgradeable to Insect Particles
Compatible with Unity 5.1 up to new versions of Unity(2023+)
Support available for assistance if any problems should occur.