Subspecies



A group sharing common characteristics that distinguish them from other members of the species. Where the differences are significant and the populations biologically isolated, these forms are classified as separate subspecies, or races. In situations where two individuals belonging to different subspecies meet and form a mixed pair, they are still capable of interbreeding successfully.

Sometimes when there is DNA evidence, subspecies may be split into new species (speciation? ).

Examples

 * Clark's and Western Grebes.
 * Black-crested and Tufted Titmice.
 * Green and Striated Herons.
 * White-tailed, Black-winged and Black-shouldered Kites.