So, geographical variation doesn't lead one to have any kind of impression that the boundaries between species are sharp and distinct if you move about.

There is geographical variation in coloration between northern and southern populations.

The sexes are alike, but there is considerable geographical variation.

There is geographical variation in the species and are classified as subspecies.

There is little geographical variation, with some minor local differences in the amount of orange on the belly.

Many other animals show similar geographical variation in size.

There are known to be both seasonal and geographical variations in depth, which may help to explain the variation.

To these geographical variations must be added the varied philosophies of the men and women who make the wine.

There are, however, some geographical variations in its voice.

There is significant geographical variation in its life history details.