1.   Among new sights to catch this summer will be rare white lions from the Philadelphia Zoo.

2.   Dolphin habitat and Secret Garden of Siegfried and Roy feature rare white lions and tigers raised by the illusionists.

3.   The two have also gained international attention for their work with rare white tigers, and more recently, with rare white lions.

4.   This secluded retreat is where the rare white lions and tigers spend much of their early years.

5.   A rare black lion tamarin monkey has been born at Adelaide Zoo, one of only five in captivity in the Southern Hemisphere, zoo officials said Tuesday.