236 BULLETIN FLORIDA STATE MUSEUM Vol. 19, No. 5
 S., 0 ..
 Feeding ecologies, habitat distribution, and taxon cycles are specified, where
 known, for all the resident terrestrial species. Taxon cycles appear to be similar to
 those of other insular avifaunas, despite the absence of montane refugia on the Cay-
 mans. Species in Stage I (evidently the recent colonizers) are more common in
 early seral stages ("marginal habitats"), whereas the endemic subspecies (Stage IV)
 are more abundant in the mature forests. Because of the relatively large number
 of available habitats, Grand Cayman has 3.8 habitats per species, an exceptionally
 high figure when compared with mainland and other insular populations. This value
 plus other data indicate a remarkable generalization for the Cayman Island birds.
 The large number of wintering species appears to influence the residents very
 little because the wintering forms usually occupy feeding niches different from the
 residents. It is suggested that the winter is characterized by an abundant food
 supply (chiefly insects) that is incompletely exploited by the resident avifauna.


 TABLE 01 CONTENTS

 INTRODUCTION 236
 ACKNOWLEID)IENTS .. 237
 GENERAL DES(I OPTION OF THE ILANI)S AND THEIR A\vI.-NA . 238
 ECOLOGICAL FORMATIONS .. 243
 AVIF NAI. DISTRIlBITION IN TIE ECOLOGIK AL FORMiATIONS 253
 PoP Il. VIoN DENSITIES ON C \Y\1\N BRA 259
 BIRD POPU.ATIONS \N]) UI, \NI) SE(xCNI)D PL \NT SUcC(:ESSION. 261
 BLEEDING SEASONS .... 265
 INTER-ISIL AN DISTBit TIONALI, PATTERNS 268
 IMMhall.I lIION S\NO EXTaIN( LION 272
 COMPETITION FO()I ENVIRONMENTAL RESOt Il CES AMONI THE RESIDENT
 TErHIESTRI \x, AV I -\ N \ 275
 PREDATION \NI) POPI L \TION CONTROL 281
 A GENERiL ASSESSMENT OF FEEDING Ec(OLOG(IES ANI) H \liITI
 DISTRIBnUTIONS 283
 T \xoN CYCLES. 283
 HABITAT DISTBIBUTIONS OF INSL LAR \ND MAINLAND) BIRD POPULATIONS 288
 THE WINTER ATANA .A.. . 291
 LITERATURE CITED ... ..293
 APPENDIX I: S('IENTIFI( AN) CON\ON NAMES OF BIRDS APPEARIN(.
 IN TEXT 296
 APPENDIX II: SCIENTIFIC I\N COMMON NAMES OF PLANTS AI'PEAIN(,
 IN TEXT 298
 APPENIX III: STORM (II CONTENTS OF C \YlM N ISLAN BIRDS 299



 INTRODUCTION

 Despite the recent burgeoning of interest in island biogeography, few
complete ecological investigations have been conducted on insular forms
of virtually any taxon level. Theoretical treatments of insular population
biology (e.g., MacArthur and Wilson 1967) necessarily relied heavily
upon many literature sources in the construction of species-area curves,
extinction-immigration curves, and other ecological models. This is not
meant to imply that such derived models are necessarily incorrect or in-
adequate, but simply to underscore the need for more raw data on island