Depending on what you do and if you get paid for it there are a number of camera combinations that people think of as apropos for that genre. For amateur/enthusiast nature photographers it is often the medium resolution but reasonably fast midrange camera and a 100-400 lens.
A7III and 100-400 GM - how did it come to this? — NaturePhocus
Canon EOS R5 vs Sony A7RIV — NaturePhocus
The Sony 100-400GM Review, for Landscapes!
Focus trouble with Sony 100mm-400mm on Sony A7iii: Sony Alpha Full Frame E-mount Talk Forum: Digital Photography Review
A7III and 100-400 GM - how did it come to this? — NaturePhocus
Borneo Wildlife Adventure with the Sony a7R III + 100-400mm GM - Alpha Shooters
Sony 100-400mm F4.5-5.6 OSS GM
Sony a7III Astrophotography Review – Lonely Speck
Focus trouble with Sony 100mm-400mm on Sony A7iii: Sony Alpha Full Frame E-mount Talk Forum: Digital Photography Review
Wildlife and Action Photography with the Sony 100 x 400 GM Lens
GAME CHANGER SONY 100-400 GM
High Resolution cameras and nature photography — NaturePhocus
Borneo Wildlife Adventure with the Sony a7R III + 100-400mm GM - Alpha Shooters