Na Hang Nature Reserve, Tat Ke Sector - Frontier-publications.co.uk

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Na Hang Nature Reserve, Tat Ke Sector 1997 7.3 Results A list of the butterfly species caught during the phase is given in Appendix 4. Figure 14 shows the distribution of species caught, between butterfly families. Figure 14. Pie chart showing the distribution of butterfly species observed at Na Hang, between families. Hesperidae Papilionidae Lycaenidae Riodinidae Pieridae Danaidae Satyridae Amathusidae Nymphalidae 7.4 Discussion A total of 93 RTUs (representing 9 families) were taken, or observed, over the study period. Although this does not represent the entire butterfly fauna of the Na Hang region (several taxa were observed but not captured), when combined with the data from the earlier SEE study, a total of 142 species is now known for the reserve. The most diverse families of butterflies in the Tat Ke sector (in terms of number of species) were the Nymphalidae and Hesperiidae (17 species each); the Nymphalidae were the most abundant in the previous SEE study. 7.4.1 Rare or unusual species Several of the species taken were new or interesting records. Three specimens of Papilio castor, a tailless swallowtail which is found from India to Taiwan, were collected. Although this is not a new record for Vietnam (K. Spitzer, pers. comm.), it has been collected here only rarely. Three unusual satyrids were caught. Mandarinia regalis is endemic to North Indochina and the eastern Himalayas, and, at Tam Dao National Park, is confined to undisturbed montane forest (Leps and Spitzer, 1989). Two of the satyrids represent new records for Vietnam; Zipaetis unipupillata and Ypthima similis. The former species may also be of a new subspecies (A. Monastyrskii, pers. comm.).. Frontier-Vietnam Environment Research Report 9 28
Na Hang Nature Reserve, Tat Ke Sector 1997 7.4.2 Seasonal changes in the butterfly fauna Although 86 species were recorded in the January to March period in the Ban Bung sector of the Na Hang reserve, and 93 in the present survey, there was relatively little overlap in the species observed; 49 species were found on the first survey (Hill and Kemp, 1996) and not the second (see Appendix 4b). Part of this difference may be due to the differing habitats in the two sectors of the reserve (and hence, butterfly foodplants). However, climatic conditions also differed greatly between the two study periods, and there is little doubt that part of the variation in butterfly faunas can be explained by seasonality. This may be noticed within individual genera; for example, four species of Neptis (Nymphalidae) were noted on the Jan-Mar survey (N. hylas, N. miah, N. soma, and N. harita); in the summer period, only one species, N. nata, was observed. The Dragontail Butterfly Lamproptera curius (Papilionidae) which was abundant in the first survey, was absent, replaced by the very similar L. meges in the summer period at Tat Ke. In the earlier survey, two species of butterfly in the family Libytheiidae were collected (Libythea celtis and L. myrrha); at Tat Ke, no libytheiids were observed. However, the Amathusiidae, a group of forest butterflies which were not recorded in the earlier survey, were an important component of the butterfly faunas of some forest habitats in Tat Ke, although only four species were present. The most common species of amathusiid was the Junglequeen Butterfly Stichophthalma louisa. Stichopthalma populations in North Vietnam are highly seasonal in nature, with imagos present only in the early wet season (Spitzer et al., 1993). Stichophthalma louisa is confined to closed forest habitats, and open habitats represent a barrier to its dispersal, but little is known of its feeding ecology or life history (Novotny et al., 1991). It is therefore entirely dependent on the conservation of forest reserves of sufficient size to support long-term populations. Frontier-Vietnam Environment Research Report 9 29
Page 1: Frontier Vietnam Environmental Rese
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Page 70 and 71: Appendix 1. Habitat; Plants Plant s
Page 72 and 73: Species Habitat Fertile Uses/Status
Page 86 and 87: stages SONNERATIACEAE 638. Duabanga
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Species Habitat Fertile Uses/Status
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FOREST TRANSECT 1 Key: Ac Ao Ar Cl
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FOREST TRANSECT 3 Key: Cl Clusiacea
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Appendix 3. Forest plot data
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Myrtaceae 4 1.081 3.60 8 1.250 4.66
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Nymphalidae 32. Cethosia biblis Dru
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Appendix 4b. Butterflies recorded a
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1 2 3 4 5 25 Opsarichthys uncirostr
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Appendix 6. Amphibians and Reptiles
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A B C Upupipae: Hoopoe 14. Hoopoe (
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A B C Subfamily Muscicapinae: Flyca
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7b. Formulation used for the assess
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Appendix 8. Key; A Identified from:
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Appendix 9. List of specimens Insec
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