The reserve is full of little brown birds. Small and brown seems to be some kind of default programme for birds and accurate identification can depend on an extra millimetre in a brown tail feather or the exact shade of a brown eye-stripe. Until they are otherwise identified, the RSPB calls them all LBJs: Little Brown Jobs.
This time of year is even worse as juveniles, mostly small, brown and freckled, spill out of their nests and confuse even seasoned birders. Here is a selection of spotted brown fledglings, any and all of which you might find in the reserve’s undergrowth:
[1] Juvenile Blackbird / Anne Burgess / CC BY-SA 2.0 [2] Juvenile robin by andymorffew/CC [3] Juvenile wren by Ken Billington; Wikimedia Commons [4] Juvenile song thrush (CC0) pixabay.com
Be patient with them; they haven’t all got the hang of flying yet and often don’t know the difference between friend and foe. If you find them on the ground, don’t pick them up; their parents will be nearby waiting for you to go. If they seem very exposed, shoo them gently into undergrowth and warn any nearby dog owners to please put their charges on leads.
The header image is of an unidentified and unidentifiable Little Brown Job photographed in the reserve by Cheryl Cronnie
Southwick Country Park Nature Reserve 
Yes we have lots of lots of little brown fledglings in our garden. We also just found a dead shrew so hopefully there may also be some live ones!