They are similar to the extent that expert knowledge is required to differentiate between specimens of the different species.

Thus, reciprocal crosses between normal and dwarf specimens may give rather different results.

These points were developed to help researchers make comparative measurements between specimens, and report finding in a unified and unambiguous manner.

The density of flint inclusions shows notable variation between specimens.

The beak varied between specimens from straight to curved, but the reason for this is unknown.

There are major morphological differences between specimens of different regions in Abruzzo.

There seems to be a significant degree of variation between specimens of M. amarali.

Traditionally, the large size variation between specimens of Rhamphorhynchus has been taken to represent species variation.

He was out of breath by the time he dashed between specimens of reindeer and saw the monkeys.

Detailed analysis at higher magnifications, however, demonstrated the differences between specimens.