Wild things and things that rustle in bushes

I'd like to add some native animals and birds to my land - possums that move at random within a specific area, even may be a mob of kangaroos, rock wallaby.

Birds that fly from the undergrowth when someone approaches.

Building the little gritters I can handle (I think), but the scripts are near rocket science to me - any pointers on how to get started would be appreciated - or working scripts would be wonderful - thanks

I have some script in my inv some where that maybe its usefull for you i call it popup (not a anacronism in the first 3 letters please )

I found it some where but i dont remember exactly if was in this forum or in another place.
I let you a copy later when login to SL

Thanks for that - look forward to seeing them