Why does an Oak sometimes hold on to it's dead leaves?

Holly Leaf Miner: The perilous existence behind a leaf blemish...

European Nuthatch (Sitta europaea)

Bonnet Fungi (Mycena species)

King Alfred's Cake (Daldinia concentrica)

Brimstone Butterfly (Gonepteryx rhamni)

Snakeflies (Raphidioptera family)

Black-spotted Longhorn Beetle (Rhagium mordax)

Turkey Tail (Trametes versicolour)

Oak Gall Wasps...and other galls

Cuckoo-spit, Spittlebugs and Froghoppers (Philaenus, Neophilaenus, Aphrophora spp.)

Common Dog-violet (Viola riviniana)

Bulfinch (Pyrhula pyrrhula)

Ichneumon wasps

False Ladybird (Endomychus coccineus)