JOHNSTON: CAYMAN ISLAND AVIFAUNA


TABLE 10.-BIRDS OF TOWNS, HOUSE SITES, AND ROADSIDES.

 Island: GC GC GC CB
 Species Date: December Apr-May August June-August


Ardeola ibis
Falco sparcerius"*
Columba letcocephala
Zenaida aurita
Zenaida asiatica
Columbina passerina
Crotophaga ani
Colaptes auratus
Centurus superciliaris
Sphyrapicus various
T!urannuis domninicensis
Tyrannus caudifasciatus
Afiiarchus stolidus
Elacnia martinica
Hirundo rustica**
Mim us polyglottos
Diumetella carolinensis
Mimocichla plhmbeac
Vireo crassirostris
Vireo nmagister
Dendroica ipctchia
Dendroica citellina
Dendroica palnarum
Coercba flaveola
Spindalis zena
Quiscalus niger
Dolichonyx oryzicorus**
Tiaris olivacea
Passerina cyanea
Melopyrrha nigra
Passerculus sandwichensis"*
 Total Species


* known or suspected breeders 19 10
"* species typical of roadside only


because the seedlings of Haematoxylon are fast-growing.
 By selecting representatives of these seral stages, it is then possible
to assess the progression of the attendant avifaunal populations, espe-
cially during the breeding season (Table 12). As might be expected
from similar analyses of secondary succession and bird populations on
the North American mainland (Johnston and Odum 1956), with ad-
vancing ecological age and increasing complexity of the plant communi-
ties, there is a concomitant increase in breeding bird composition, at
least through the subclimax (logwood-thatch palm-red birch) formation.
Similarly, total density figures show an increase. On the other hand, if
one considers the wintering populations (inclusive incidentally, of the


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