One of the most striking features of bird migration is its regularity. Most populations of birds
migrate at about the same dates, in the same directions, and for similar distances each year …

In northern England, large areas of marginal agricultural upland have been planted with
conifers. This paper compares the assemblages of carabid beetles in such forests with those …

In non-native conifer plantations characterized by strong spatial and temporal variations in
the availability of tree seeds in Spadeadam Forest, northern England, the home range and …

Immigration patterns and the frequency of breeding dispersal in tree squirrels are predicted
to be related to the amount of temporal and spatial variation in tree seed crops, their primary …

The diet of tawny owls Strix aluco was determined from pellets and prey items in owl nests in
Kielder Forest, a planted spruce forest in northern England. Field voles Microtus agrestis …

Aims Understanding fluctuations in plant reproductive investment can constitute a key
challenge in ecology, conservation and management. Masting events of trees (ie the …

Over much of Europe, Common Crossbills Loxia curvirostra depend primarily on the seeds
of Norway Spruce Picea abies, and their breeding and movement patterns are governed …

Many species use antipredator vocalizations to signal information about potential predators,
including the level of threat posed by a particular predator. It is not clear, however, why only …

Red Sciurus vulgaris and grey Sciurus carolinensis squirrel ecology in conifer forests in
Europe is reviewed with reference to squirrels in similar habitats in North America. Red …

The taxonomy of Procellariiformes, particularly petrels and shearwaters, is still unresolved.
The Manx shearwater Puffinus puffinus is one of the best studied seabirds worldwide. Most …