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Changes in Structure of Head Feathers of Wild Plumage Type:Male Mallard Ducks (Anas platyrhynchos var.domesticus) Following Seasonal Plumage Changes
mallard duck seasonal dimorphism plumage pigment feather structure
2009/7/31
Seasonal changes occur in the plumage of male mallard ducks, and this phenomenon is referred to as seasonal dimorphism of the plumage. However, no information is available, especially morphological, a...
Changes in Behaviour of Laying Hens Following Beak Trimming at Hatch and Re-trimming at 14 Weeks
Laying Hens Beak Trimming Behaviour Pain
2016/4/27
For many years beak trimming has been a controversial subject, particularly since the 1980??s when the practice came under close scrutiny by animal welfare groups. In Australia it is considered an ess...