Courtship behaviours help animals attract mates through displays and signals that are species specific.

It helps to ensure successful mating and raising of offspring.

In species where females only produce eggs at specific times, courtship behaviour is important to determine if the female is at the receptive stage for mating, ensuring successful reproduction.

Courtship behaviour ensures mating only takes place between members of the same species, leading to successful mating, production of fertile offspring, and raising of offspring.

This passes on the species' genes to the next generation thereby aiding species survival.

Phylogenetic classification is based on evolutionary relationships between organisms and their ancestors, classifying species into groups. 

It reveals how closely related organisms are.

Phylogenetic classification produces a continuous tree that doesn't force organisms into specific taxonomic groups where they don't quite fit.

This also means that there is no overlap between the groups produced.

A phylogenetic tree is a diagram used to represent the evolutionary relationships between organisms.

It shows that different species have evolved from a common ancestor.

The oldest species is shown at the base of the tree, while the most recent species are shown at the ends of the branches of the tree.

Artificial classification divides organisms according to differences that are useful at the time, such as colour, size, number of legs, leaf shape, and so on.