How can a camera sensor system differentiate between animals?

I don’t know if this is the right place, if it’s not please point me in the right direction.

I’ve been tasked with a job to keep geese off of our local field as it’s become a health and safety violation. Not to mention the field is destroyed.

I want to build an autonomous robot that will chase the geese (not harm them) and scare them away. How can a camera differentiate between geese and other animals like dogs or even children? Where would I even look for this?

Thanks

submitted by /u/NooneWillGiveMeAName
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