Common Shrew Welfare: Abundant but Overlooked Mammals in Gardens

Common shrews are among the UK's most abundant mammals but are rarely noticed. Their welfare reflects the health of invertebrate communities in gardens and farmland.

Key Facts

Common shrews must eat around 80-90% of their body weight daily or face rapid starvation
They have a lifespan of only 12-18 months and die after their first winter as adults
Shrews are aggressive and territorial - fights between individuals can be fatal
They cannot tolerate exposure to cold and must find shelter rapidly
Cat predation kills large numbers of shrews but cats typically do not eat them due to scent glands
Soil compaction reduces earthworm and beetle populations that shrews depend on

Welfare Considerations

Common shrew welfare centres on the adequacy of invertebrate prey and the availability of shelter. A shrew that cannot find sufficient prey within a few hours faces severe metabolic stress and death. Their short, intense lives mean welfare quality matters at every moment. Cat predation is significant but distinctive: cats kill shrews through hunting behaviour but leave them uneaten due to distasteful scent gland secretions - a welfare harm without the ecological function of consumption. Maintaining soil structure and invertebrate-rich habitats in gardens and farmland directly supports shrew welfare.

What You Can Do

Create log piles and leaf litter areas in gardens to support invertebrate prey
Reduce or eliminate soil compaction by limiting heavy machinery on lawns and garden beds
Keep cats indoors at night to reduce shrew mortality
Avoid pesticide use that reduces soil invertebrate populations
Support soil health research by participating in garden wildlife surveys