Jays

While most birds have become rather quiet we are still hearing the harsh squawking of Jays.  They are in the crow family but are much shyer than most of that gang - crows, rooks, jackdaws and magpies.  Consequently you are more likely to hear jays than see them.  They have a harsh scolding call.

 

They like acorns and cache them in the grass, so they in fact are important planters of oak trees. 

 

Grey squirrels who also plant acorns, have a similar call but not quite so loud - kwk kwk kwwwwwk,  kwk kwk kwk kwwwwwwwk.