When is enough enough? Effective sampling protocols for estimating the survival rates of seabirds with mark-recapture techniques

Lower intensity mark-recapture studies, such as those undertaken by citizen scientists, provide an opportunity to improve the spatial representation of survival estimates for birds. Colonial nesting birds are particularly suited to this because, for many species, large numbers of breeding birds and chicks can be located relatively easily. The minimum level of recapture effort required to accurately estimate true survival rates and detect temporal variation largely depended on the respective ringing effort. Therefore, mark-recapture studies should consider both aspects of the field study when setting or adjusting minimum effort guidelines. Furthermore, achieving reliable estimation with short time-series required more intensive survey designs, highlighting the importance of longevity when planning these studies.

An efficient survey method for estimating populations of marsh tits Poecile palustris, a low-density woodland passerine

Effects of supplementary feeding on interspecific dominance hierarchies in garden birds

Bird Photographer of the Year 2018 (Collection 3)

The Bird Photographer of the Year competition celebrates the artistry of bird photography, and this large-format book is lavishly illustrated to reflect this. A celebration of avian beauty and diversity, it is a tribute to both the dedication and passion of the photographers as well as a reflection of the quality of today's modern digital imaging systems.

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Habitat diversity and structure regulate British bird richness: Implications of non-linear relationships for conservation