The sparrow had a lucky escape:).
We have lots of sparrows in our garden as I hang  bird seed feeders
on the washing line.
He might have been looking for food in the borders or perhaps he was
ill and was hoping you wouldn't notice him.
Alison

We have the same problem here with lizards that get in the house.  With 9
cats it's a battle to see who will get to the lizard first...and, of
course, the lizard...not knowing that I'm trying to help....tries to
outrun us all!!!

Probably a baby (fledgling).  They haven't had time to learn fear of people
(or cats) yet when they first leave the nest and figure out the flying
thing.  I'm glad it's okay.  It's one thing to be proud of the cat for
making its first kill; it's another thing to encourage it (unless you have
barn cats and need "mousers").

Back before Persia acquired me I heard a ruckus and was trying to figure out
where it was coming from.  I tracked the noise down to the utility closet
(where the heater unit is) in my hallway.  I opened the door and out hopped
a young Starling.

http://www.rspb.org.uk/birds/guide/s/starling/index.asp

They were introduced to the United States from the UK in the late 1800's.

This little bird hopped right over to me and perched on my hand.  I looked
up and there was a hole in the ceiling of the utility closet and lots of
insulation hanging down.  The parents apparently found a way into the
"attic" (which is nothing more than a useless crawlspace) and the fledgling
fell down through this hole.  OOOPS!

I popped it in a cage (much as Helen S did with her little voles) with some
water.  Fed it some moistened bread while trying to figure out what to do
with it.  I called a local animal sanctuary and was dismayed to find they
don't take birds.  HUH?  But since Starlings eat worms, grubs (aka "meat") I
went and bought a small tin of dog food.  It could perch and could fly about
a dozen feet.  It would eat, tuck its head back and sleep for a couple of
hours, then wake up and start screaming for food.  I was up half the night
feeding the little critter.  All the while I could hear the parents yelling
for the baby, but a bad storm came in.  I waited until the next day when
things had calmed down, then turned it loose under some shrubs along the
wall behind my apartment.

Jill