The GSPCA says it's been inundated by fledglings this spring.
Shelter Manager Steve Byrne says islanders are bringing in baby birds daily.
He says this is typical for springtime, as fledglings learn to fly, and concerned islanders find them on the ground.
Steve says they should be left in the wild unless they are visually sick or injured - as their intensive care unit is reaching capacity.
"We are getting a few dozen each week at the moment, but that is increasing every day.
We could be seeing easily start seeing three figures in a week of birds needing our help.
Their parents will teach them the skills they need to survive - to find food and avoid predators.
Bringing them into captivity, it is a lot harder for us to teach them those skills, but we do our best."
There are currently finches, pigeons and ducklings in the GSPCA's care.
The shelter dealt with more than 2,500 wild birds last year.
Guernsey FC receives financial support from local entrepreneurs
Guernsey footballer Alex Scott called up to England squad
Guernsey's skin cancer rates higher than England
Guernsey ambulance subscriptions to increase by 1p a day
Deputies approve Guernsey's budget, with amendments
Thousands for Guernsey and Jersey schools to boost active travel
Personal reasons prompt Guernsey Deputy’s departure from ESC
New Aurigny aircraft flies into Alderney
