Sand fiddler crabs that reside in a burrow usually prevail if challenged by another, intruding crab, provided their claw pinching strength is similar to that of the competing crab, a study suggests.

RamonaRamona — Small rare owls are getting a new home on the Ramona Grasslands Preserve, after decades of urban sprawl nearly eliminated them from San Diego County. Last winter the San Diego Habitat ...

If you are reluctantly considering a spot of spring-cleaning, spare a thought for zookeepers. They have 30 smelly penguin burrows to clean - and they do it lying face down in wet sand with a garden ...