Maybe they need the protein & oil to regain good health after raising their young then moulting!
2013 photos & vids here
eff37 on Flickr
In reply to WendyBartter:
Hello David, l can't say that I have noticed our birds doing this, they feed from the seed, nuts, Niger seed and sunflower hearts. Maybe it is that they need extra goodness from the peanuts after rearing their young.
Beauty is in the eye of the beholder.
We spend 90% of net income on conservation, public education and advocacy
The RSPB is a member of BirdLife International. Find out more about the partnership
© The Royal Society for the Protection of Birds (RSPB) is a registered charity: England and Wales no. 207076, Scotland no. SC037654