'Bumbarrel' is an old name for the Long-tailed Tit, everyone's favourite garden bird. And the reason they're called that is for the shape of their nest. It's almost spherical, with a little hole at the front, and made from a special weave of moss, lichen, spiders' webs and feathers.
A non birding day today, but I did manage a quick dash to Dagenham Chase after Vince found a Spotted Flycatcher. A species which can be difficult to connect with locally, Spotted Flycatchers have declined dramatically and consistently since the 1960s. Demographic modelling provides
evidence that a decrease in the annual survival rates of birds in their first
year may have driven the decline. The ecological causes of the decline are
uncertain as good-quality, direct evidence is sparse. Check out the BTO website for more onformation.