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A sequence of behavioral patterns that eventually may lead to completed mating.



in ornithology, special behavior at the beginning of the mating period by which the male or female bird attracts an individual of the other sex and by which the birds are brought to a state of readiness for mating. Courtship is a form of animal communication and is expressed in various ways. It may involve singing, special flights, the adoption of special poses to display brightly colored plumage, the construction of false nests, or fights and “tournaments.” Courtship behavior is especially characteristic of polygamous species, for example, the black grouse. The males gather together in special areas away from the females. In the rare case of polyandry, as seen in phalaropes, the female courts the male. Among monogamous species the male courts the female.

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In the unlikely event EDATE fails to work, you probably haven't enabled Analysis ToolPak, which is usually in Excel but by default isn't enabled.
Again, enable the EDATE function and give the cells a date format for the output to appear as desired.