At this time of year, lots of Blue and Great Tits broods are starting to fledged, having been fed on caterpillars and other insects.
The Blue Tits that we're following on the BTO website and previously reported are very close indeed to fledging now, as are many all over the country. Will you be the first to see them fledged?
Here in Thetford, Norfolk we have had the odd brood dying from unknown causes, either adult predation or abandonment and out of the successful ones there have been a few broods with a definite 'runt of the litter'. Could it be that the caterpillar emergence was even earlier than expected this year due to possibly the warmest spring in a very long time, effecting food availability? Only time and more data will tell.