Abstract
The study is based on the avian community observed in the region. In total, 1,079 individuals, 62 genera and 79 species of birds belonging to 35 families have been recorded. Among them, the family Anatidae with 20.42% incidence is the most frequent; immediately followed by the family Phoenicopteridae (10.59% of occurrence). Little Cormorant Phalacrocorax niger is the most abundant avian species observed. The community consists of 44% resident; 36% resident-migrant and 20% migrant bird species. It was observed that the concerned community shows a considerable diversity and a correspondingly low value of dominance. In the feeding guild analysis, the insectivore guild has the most number of recorded avian species. The feeding guild affiliations also point out that the overall community is fairly rich in its composition as it houses bird species belonging to various feeding guilds.
Highlights
The observed birds belonged to only two IUCN Red List of Threatened Species categories, viz., Least Concerned (LC) and Near Threatened (NT) [IUCN 2001]
In total, 44 migratory bird species have been recorded (Fig. 2); which account for 56 percent of the total species observed
The value of the Shannon-Wiener Diversity Index (H’) of the studied community depicts that the chances of getting an individual of the same species in a random sample is about 3.75; which points out to the considerably vast population size of almost every species sampled during our study
Summary
The observed birds belonged to only two IUCN Red List of Figure 1. All the different kinds of migration categories, viz., the resident (R) birds, the resident-migrant (RM) birds and the migrant or migratory (M) birds have been observed during the survey. In total, 44 migratory bird species have been recorded (Fig. 2); which account for 56 percent of the total species observed. Invertebrate-feeder, piscivore, insectivore, granivore, frugivore, reptile-feeder, ophidiovore, amphibianfeeder, nectarivore, weedivore, plankton-feeder, herbivore, carrion-feeder and predatory were identified; among the bird species observed (Ali & Ripley 1987) (Fig. 3). We have observed that the high values of the Simpson diversity index (0.9676) indicates the high diversity observed
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