In broad terms children will reflect what is normal to their parents reflected through their own personalities. In our family children, boys and girls, take to reading like ducks to waters because every member of the family has a house full of books and is always reading something.
Similarly with wildlife. DGD is essentally a dressing-up role-player and probably wouldnt be interested in wild-life, except that DiL is really interested in wildlife and DS likes growing vegetables, so DGD from infancy has been walking in the countryside with someone interested in flowers and birds and has her own little garden where she plants, mainly windmills. DGS on the other hand inherits the wild-life interest from his mum. Last year he discovered insects and then, oh then, he discovered SLUGS - and last year was a good year for slugs. Every but everybody was greeted by very small beaming boy, hand outstretched on which was a very large slug saying 'I minding a slug'. They were kept in jam jars and fed lettuce. As they say nature and nurture.......