polionotus (Danielson and Hubbard 2000) and S. hispidus
(Bowne et al. 1999) from this experiment have
been published, but the analyses of the effects of corridors
on movement direction are new. Although unpublished
data comprise the bulk of the paper, we include
the published results on corridor effects on movement
directions of butterflies because they allow us to
make clean cross-taxonomic comparisons.
Butterflies were studied in daily surveys of all patches
between 3 April and 29 June (for detailed methods,
see Haddad 1999a). Each butterfly was captured and
marked with a unique number. An average of 124 J.
coenia (range 38–532) and 11 E. claudia (range 1–38)
were marked in each patch. Recaptures provided measures
of movement between all pairs of adjacent patches.