Instinct is the innate or inborn tendency that animals have.
For example, some dogs have the herding instinct. They naturally know how to round up sheep.
Intuition is the awareness some people have. They make decisions on strong feelings without having all the facts.
For example, if you are lost and you have a choice of 2 different roads, you might pick the one that feels right.
You make a choice on your intuition, not on reason.
Hope this helps