Melanic forms, though, are particularly prevalent in species with complicated lives—those that inhabit a range of habitats, are active both day and night, and move between the ground and the trees.

Other ways to get value for money include shortening your holiday, we have a range of 10- and 11-night holidays, if 14 nights is over your budget.

Globally, poultry are kept under a wide variety of production systems that range from those with very rudimentary night shelters to those with fully automated, environmentally controlled systems.