5.2.4 Birds 111. The potential effects on birds were examined in the Evidence Plan process and consideration given to which should be considered in the HRA process. The potential effects were discussed in both the first Ornithology Expert Technical Group meeting on 1st September 2013 and at the second Ornithology Expert Technical Group meeting on 11th November 2013. The results of those discussions was that it was agreed with Natural England and the RSPB that the following potential effects, related to specific stages of the offshore components of the proposed project, should be considered in the HRA process.


 Construction o Disturbance / displacement; and o Indirect impacts through effects on habitats and prey species.


 Operation o Disturbance / displacement; o Indirect impacts through effects on habitats and prey species; o Collision risk; and o Barrier effect.


 Decommissioning o Disturbance / displacement; and o Indirect impacts through effects on habitats and prey species


112. Based on the data collected from site specific surveys for the proposed project and a review of existing data sources, the bird species likely to occur in the in the East Anglia THREE site can be grouped in to a series of categories for this high level screening process. This categorisation is based on biological relationships related to breeding biology, feeding, habitat use and migratory pathways. The categories are:


 Breeding seabirds;  Breeding waterbirds;  Non-breeding seabirds  Passage waterbirds; and  Wintering waterbirds.


HRA High Level Screening May 2014


East Anglia THREE Offshore Windfarm Page 41


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