Me no scientist.
Take for example, when Bambi was born: Within a day he was able to walk/run etc.
Then, take a day in the life of Bambi: Run away from things that chase you, eat stuff that tastes good, mate with anyone you feel like.
Take one pregnant birdie, add a bit of pain, equals little birdies: They grow up, make out with other birdies, build nests, have more little birdies.
The point I'm trying to make (albeit with poor examples) is that to me, animals seem to have a BIOS. (Basic Input/Output System)
Aka instinct?
Birds: They build nests without a DIY kit, or even a manual.
Bambi: He gets up after birth, then knows how to walk/run.
Do humans have instinct?
Shortly after birth are we able to walk?
To warn others of impending danger?
I don't believe that we have instincts.
Which leads me to my next point: If we (humans) don't have instinct/s, then we are an entirely separate category, not part fish/monkey/whatever.
So... read... think... form an opinion.
If you wish, flame, but not too much as I don't like heat.
NOTE: Lots of holes in my reasoning/theory, so don't shoot it down too badly
PS: Li'l bit tired so adding this disclaimer: What I stated was written at 1AM.