. Bulletin of the British Ornithologists' Club. 3i [Bull. 1979: 99(1)] in weight and size of the 3 trochilids on this island. In montane habitats, where regularly all 3 hummingbird species overlap, O. c. exilis normally- feeds on flowers close to the ground ( Lantana camard), while the other two, the Green-throated Carib Sericotes holosericeus and the Purple-throated Carib Eulampis jugularis, frequently visit flowers from 2 to 3 m above the ground up to the tree tops ( Spathodea campanulatd). The mensural and weight characteristics of O. c. exilis (Table 1) indicate that females
. Bulletin of the British Ornithologists' Club. 3i [Bull. 1979: 99(1)] in weight and size of the 3 trochilids on this island. In montane habitats, where regularly all 3 hummingbird species overlap, O. c. exilis normally- feeds on flowers close to the ground ( Lantana camard), while the other two, the Green-throated Carib Sericotes holosericeus and the Purple-throated Carib Eulampis jugularis, frequently visit flowers from 2 to 3 m above the ground up to the tree tops ( Spathodea campanulatd). The mensural and weight characteristics of O. c. exilis (Table 1) indicate that females differ significantly from males in wing-length (p<o-oo2 5; t-test) and tarsus (p<o-ooo5; t-test). Table i Mensural and weight characteristics of Orthorhyncus cristatus exilis of St. Lucia, West Indies. Sex Mean SD SE Range Nt Wing (mm) M F 48-9 46-3 1-56 0-30 0-55 0-58 46-0-51-o 46•0-46•7 8 5 Tail (mm) M F 28-9 28-2 1-25 0-20 0-44 0-54 27•0-31•0 28-0-28-3 8 5 Bill (mm) M F 15-2 15-9 I-5I 0-40 0-53 0-18 11-8-16-7 11-5-16-2 8 5 Tarsus (mm) M F 3'8 3-i 0-30 0'20 0-46 0-54 3-0-4-0 3-0-3-4 8 5 Weight (g) M F 3-i 31 0'25 O-IO 0*09 0-04 2-8-3-4 3-0-3-2 8 5 Only the males of 0. c. exilis establish feeding territories. The females forage along fairly regular routes, 'traplining' many dispersed flowers (Colwell 1973, Feinsinger 1975). During the breeding season from January to August males hold display territories containing a feeding teiritory (core area) and an outer edge (buffer zone; see Pitelka 1951). The males advertise their presence in their territories by singing (see Fig. 1). Contrastingly, females establish only nesting territories, where they persistently attack intruders. I have never heard a female sing, but have occasionally noted a monosyllabic '^ kHz I6-1 OJ. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfe
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