Nuthatches are woodland birds that are expanding their range northward as climate changes but remain dependent on mature woodland with large trees for feeding and nesting.
Nuthatches in fragmented woodland landscapes face dispersal barriers when moving between isolated woodland patches. Juveniles attempting to establish territories in gaps between woodland fragments face elevated mortality from exposure and predation. Cold winter periods reduce bark invertebrate accessibility causing nutritional stress. Woodland management removing veteran trees eliminates both nest sites and food-caching substrates. Squirrel competition for cached food can reduce winter food security for nuthatches.