Is the tamron 50 400mm f 4 5 6 3 di iii vc vxd long enough for birds?

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From Tamron 50-400mm f/4.5-6.3 Di III VC VXD: Tamron 50-400mm f/4.5-6.3 Di III VC VXD: A zoom lens by Tamron for Full frame cameras, 50-400mm f/4.5-6.3. Specs - Maker: Tamron - Focal length: 50-400mm (zoom) - Maximum aperture: f/4.5-6.3 (it gets darker as you zoom in) - Made for: Full frame sensors - Mounts: Sony E, Nikon Z - Stabilised: yes - Autofocus: yes What it frames like - On full frame (Sony E, Nikon Z): as marked, 50-400mm. - On APS-C (Sony E, Nikon ...

From Tamron 50-300mm f/4.5-6.3 Di III VC VXD: Tamron 50-300mm f/4.5-6.3 Di III VC VXD: A zoom lens by Tamron for Full frame cameras, 50-300mm f/4.5-6.3. A compact stabilised telephoto zoom that starts at 50mm.

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