Isla de Cedros lies within an arid climatic region and supports a diversity of vegetation community associations. These range from sarcocaulescent desert, made up of succulent-stem trees and shrubs, to coastal sage scrub, ...

In 1968, Schreiber (1970) found that 11.3 per cent of the clutches of Western Gulls (Larus occidentalis wymani) on San Nicolas Island had more than three eggs. He believed that the low hatching success (0.13 per cent) ...

Biologists are familiar with the thought that islands have unique scientific value as natural laboratories where the mainland species pool is reshuffled by differential immigration, extinction, and evolution to form new ...

The island night lizard, Xantusia riversiana Cope (Fig. 1), is found only on Santa Barbara, San Clemente, and San Nicolas Islands off southern California (Fig. 2). The species is sufficiently divergent in morphology from ...

The power of flight has preadapted bats for island colonization. This accounts for their disproportionately high representation in the terrestrial mammalian fauna of the California Islands. Of the eighteen species of native ...