Ecology:
Shelter

Shelter in Coastal Prairies

With the lack of shrubs and trees, coastal prairies are open habitats, making cover a particularly difficult problem for many species. Birds and mammals will seek out the larger perennial grasses, sometimes even weaving or bending them over their nests. Small animals burrow into the ground or utilize burrows dug by other animals. Dense patches of grasses, forbs or sedges can act as refuges providing nesting areas and cover for small animals, birds, reptiles, and insects. Thatch can provide important cover for insects and mollusks. Raptors and other birds of prey that hunt in grasslands utilize nearby trees for nesting and cover. In more recent times, humans planted cypress, eucalyptus and other trees to gain shelter from strong ocean winds which are often used by birds of prey for perching and nesting.

Survival Strategies with Little Shelter

Tunneling

Most burrowing animals have sharp claws that they use for digging.

Surface Tunneling

Disguised nest of ground-nesting bird in coastal prairie at Jenner Headlands, Sonoma County. Photo by D.L. Immel.

Camouflage

Most grassland birds nest and forage on the ground and use the surrounding vegetation to hide from predators.

Northern harrier protecting its nest from an interloper in coastal prairie in Sonoma County. Photo by Jim Coleman 2010.