The weight increases some of the birds have shown recently is quite impressive - NW31951, a first winter female, weighed 62.8g on 20/04/13 but weighed 74.3g when retrapped this morning, an increase of 11.5g in 7 days or 18.3%.
NW31942, an adult female, weighed 63.3g on 19/04/13 but weighed 78.5g when retrapped this evening, an increase of 12.2 g in 8 days or 19.3%.
Apples may not be a natural food supply in spring but the data is still valuable and a good measure of their ability to put on weight. The birds are actually less dependant on the apples now and are also feeding on the emerging flowers of various trees. I have seen them feeding on Poplar flowers recently and the emerging flowers of Ash today.
|There must be significant nutritional and or energy value in the emerging flowers given the effort the birds put in to get at them. I have also seen quite a few Wood pigeons feeding on Ash flowers in the past few days.|
|NW65022 retrapped today.|
She was first seen on 18th February amd her details can be found by clicking here.
|Kingfisher (Alcedo atthis) 27/04/13|