PR JA
A A


 Mich. Me.
 0 0


 CR Al.
 00


Ga. Al. E
 CD A


N.C. Ga. SJ
OOA


 I I I I I
 O I 2 3 4

 MEAN NUMBER HABITATS/SPECIES
FIGURE 19.-Habitat distributions of insular and mainland bird populations. Pa.=
Panama (MacArthur, Recher, and Cody 1966); PR=Puerto Rico (Recher 1970);
JA= Jamaica (Ricklefs 1970); Mich.=Michigan (Kendeigh 1948); Me.=Maine
(Stewart and Aldrich 1952); CR= Costa Rica (Orians 1970); Al.= Alaska (Kessel
and Cade 1958, Williamson et al. 1966); Ga.= Georgia (Johnston and Odum 1956);
B=Bermuda (Crowell 1962); N.C.=North Carolina (Odum 1950); SJ=St. John
(Robertson 1962).