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| == Breeding Cycles == | | == Breeding Cycles == |
| + | * Classified according to length of cycle and the time of year when the species becomes reproductively active. |
| + | ** Continuous breeders are reproductively active throughout the year e.g. Khaki Campbell duck. |
| + | ** Most wild species that breed in temperate, subarctic and arctic zones display yearly cycles. |
| + | * Tropical or desert species may breed with cycles less than a year, at 6-month intervals or when conditions are favourable (opportunistic breeders). |
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| + | * Usually lay one or more eggs in a clutch and terminate laying to incubate the eggs. |
| + | * Number of eggs per clutch and total number of clutches vary with species and season. |
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| == Endocrine Control == | | == Endocrine Control == |
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| == Oviposition == | | == Oviposition == |