Percent recapture beyond one year is running 8-9% for 
locally breeding neotropical migrants and 12-15% for 
permanent resident breeders.  The steep drop in these curves 
in the first 90 days can be explained by taking banded 
hatch-year birds into account.  Most of these young birds
disperse away from the station never to return.

Fox Sparrows are nearctic migrants which breed elsewhere.
There presence from late fall through early spring produces
a differently shaped curve, from breeding birds.
 

	total captures	individuals  recaptured
SOSP = Song Sparrow	142	34
FOSP = Fox Sparrow	33	10
BCCH = Black-capped Chickadee	36	11
COYE = Common Yellowthroat	69	10
SWTH = Swainson's Thrush	72	12