You can purchase and download this model here:
https://www.cgtrader.com/3d-models/animals/bird/animated-low-poly-raven-model-with-pbr-materials
https://www.turbosquid.com/FullPreview/Index.cfm/ID/1582275 https://blendermarket.com/products/Animated%20Low%20Poly%20Raven%20Model%20With%20PBR%20Materials
https://www.pond5.com/3d-models/133587234