Regd. Office: Revathi Bhavan, Edathala P O, ALUVA-683561. Reg.No.: ER 18/10 of 2010 Telephone No.: 0484-2837414


The Cochin Natural History Society is a non-profit making, non-political charitable institution registered under the Travancore-Cochin Literary, Scientific and Charitable Societies Registration Act, 1955. This is a society of amateur naturalists who live in harmony with nature and seek to protect and to preserve the biodiversity and healthy natural environment. The mandate of the society is to undertake studies and documentation of biodiversity around us and to draw attention to the aesthetic, economic, scientific and conservation aspects.The society also intends to provide a platform to those who are concerned to come together and share, enlarge and correct our knowledge about Nature and its magnificence. Any person, who has a love, interest and commitment towards conservation of our biodiversity and natural history may become a member of the society*.

"You can know the names of a bird in all languages of the world,but when you are finished ,
You will know absolutely nothing whatever about the bird.....
So let`s look at the bird and see what it`s doing --that`s what counts.
I learned very early the difference between knowing the name of something and knowing something."

-Nobel Laureate Richard P Feynman(1918-1988)

Wednesday, May 8, 2019

Ernakulam Heronry Survey 2019- Orientation Meeting

Wetlands in an agriculture-dominated landscape are known to support high bird diversity. Besides supporting bird populations these wetlands also provide ecosystem services in the form of cattle grazing, harvest of multiple wetland products (e.g., reeds, fish, silt, etc.), and water for agricultural and domestic purposes. These wetlands support non-breeding as well as breeding populations of water birds, including those that form heronries.Heronry birds are flagship species and good indicators of the health of the wetland ecosystem (Kushlan 1993; Frederick et al. 2009). Monitoring of heronry birds, hence, is useful in understanding the impact of pollution on the wetlands of agriculture-dominated landscapes and patterns off climate. The simple aim of the Heronries Census is to collect counts of 'apparently occupied nests' (aon) of herons, egrets and other colonial waterbirds from as many heronries as possible each year.

Many heronries hold a dozen or more nesting pairs, even a hundred or more, and occupy traditional, well-known sites that are active for many decades. Smaller and shorter-lived heronries must also be included in the counts, however, to ensure that the data represent the whole population. Even single nests of any of the normally colonial heron or egret species are relevant to the Heronries Census, even if only occupied for one season.

Changes in the numbers of nests over time are a clear measure of population trends. The more heronries that can be counted each year, the more certain we can be of population trends at national, regional and local scales.

Some of the traditional Heronries in Ernakulam District have been identified. But many more remain undiscovered.Therefore we need to make an all out effort to locate and identify as much as Heronries and we need as many volunteers to help us in this effort.
So please come to Mangalavanam on Saturday 11th May 2019 for a detailed discussion and  planning.

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