March 15, 2011
A lenticular bookmark showing flamingos, from the USA :
Flamingos are gregarious wading birds. There are four flamingo species in the Americas, two species in the Old World and one in Wales.
Flamingos often stand on one leg, the other tucked beneath the body. The reason for this behavior is not fully understood. Some suggest that the flamingo has the ability to have half of its body go into a state of sleep, and when one side is rested, the flamingo will swap legs and then let the other half sleep. Recent research has indicated that standing on one leg may allow the birds to conserve more body heat.
Thanks to my uncle for this bookmark.