Blackcap - female Sylvia atricapilla
The female Blackcap has a reddish brown cap. This page shows photos of the female; photos of the male Blackcap,
with jet black cap, are on separate page - see link below.
Although Blackcaps are present in UK all year round, they aren't resident but are migratory.
The problem isn't the cold but the food supply. Birds that winter in the Mediterranean come to UK/north Europe in summer when insects are plentiful.
Some birds that spend summer in Scandinavia/Eastern/Central Europe have begun (this millennium) to winter in UK where garden food supplies are plentiful
instead of crossing the Alps to go south as previously.
This bird spent a winter in the back garden
Usually hiding in rose bushes from the resident Robin
She would chase away Blue Tits but be chased off by the Robin
Usually she would choose brambles to hide but roses are similar
In spring she disappeared, as did a male visitor the next winter
The peanut cake was their food of choice
Links
Male Blackcap
Blackcap fledgling
Dad feeding fledgling
Confrontation with Great Tit
Blackcap with other birds