Monday, November 05, 2007

The Breeding Season 2007

Initial analysis of "Constant Effort Site" ringing has indicated some terrible breeding seasons for some species. Seven had their worse breeding season ever - the greatest sufferer being Blue Tit (48% below the long-term average). Other species affected were Great Tit (33% below normal (bn)), Reed Warbler (27% bn), Whitethroat (25% bn) and Willow Warbler (19% bn). Treecreeper and Willow Tit also fared badly but figures produced may be unrepresentative due to the small sample size.
On the other hand though Long-tailed tits, being early nesters (before the bad weather of May, June and July), showed an increase of 48% on the long-term average.

0 Comments:

Post a Comment

<< Home