In 2023 also resident BWS population in Pepiliyana wetland kept breeding. I first noted few nests when I visited the site on 22nd April. Visited the site on 25th and 26th April as well where female parent birds were sitting on at least 3 nests. Eggs were also seen time to time what the number I believed to be 4 in each. [observed through the field scope from a distance where I managed to see the eggs only during brief movements of birds. Images are also digi-scoped]. As same as the last years, I learnt from a regular farmer there that they safely restored the nests after they set up the fields using tractors. Luckily with the enthusiasm created farmers would notice these nests before they plough the fields wafter which they restored them upon the completion of setting up the fields. It's amazing that the parent birds return to the nestimmediately after such heavy work is taken place at their nesting sites. This proves the role of awareness and enthusism created in community in conservation while showing evidence of the symbiosis between human and nature as well as the importance of urban wetlands in Colombo.
Pouring rains commenced on 29th April and 1st May as monsoon starts. I wondered whether the nests would have been flushed in the fields and managed to visit the site on 5th May on which I was delighted to see 2 nests remaining safely along with the birds sitting on them. The fields were getting slightly greeny on that day. Mekhala joined me in some of these visits.[please, continue reading below for prevoius sightings and the introduction in the first note] |
[Contd. from my previous observations, which follows next and below]
The Two chicks that I was observing were well grown in my next visit on 10th June 2022 to the site, and were seen being well developed in flying skills as well as some sort of vocalization. They showed a scalloped plumage on upperparts with one individual being darker (I belive it to be a male, which needs further studies). I have seen few individuals in similar stage of development time to time during the migratory season here as well. Today both parent birds were seen in assoociation with the chicks, yet the female adult kept closer taking care of them. Noteworthily another family of Stilts appeared later and joined others that I beleive having been bred in other side of the marsh. |
In 2022 also I was able to see Black- winged Stilts breeding in Pepiliyana wetland as similar as last year (see below description). On 24th April 1-2 pairs were seen selecting nesting sites followed by my next visit on 3rd May, when there were 3 nests with adult birds incubating. Like last year, farmers had left nests undistroyed after setting up the fields. To my excitement on my next visit to the site on 22.05.22 I managed to see two fledged baby birds feeding busily in the late afternoon. A single parent bird was seen taking care of them , but from a distance, leaving them feed alone. In our next visit on 1st June, 2022 we were happy to see the both chicks again who had grown up to about half the size of the adult bird. They were seen in association with the parent bird. |
Black- winged Stilt (Himantopus himantopus) represents in Sri Lanka as both resident and migratory populations. The breeding population is mainly found in the dry zone while resident birds are local in the wet zone. Overall, the numbers highly increase in the whole range of the island during the migratory season from around October to April, each year. Specially there is a significant increase in Colombo wetlands towards December, proving that the majority of the population is migratory there. Hence, birders believe that BwSs do not breed in the wet zone or only occasionally.
But I keep observing them breeding in small numbers in certain Colombo wetlands from a long time. Pepiliyana is a remarkable wetland regarding this subject too, as it provides habitat for BwS to breed usually each year. But the breeding success is very low.
This year (2021) too at least three nests with birds sitting in each were seen by me on 16th April. At that time fields were abandoned temporily after the paddy harvest was taken, hence a suitable habitat had been created for the BWSs to breed. In my next visit with Tharu on 26th April, the fields were partially ploughed to cultivate the next season. Soon I noticed an active nest very unusually in the middle of a ploughed field and I shared my view with my daughter that I believe that the nest would have been relocated by farmers. Sadly the other nests have gone missing. In between this and the last visit a heavy overnight rain occurred that may have washed the other nests that could have affected by ploughing too. I observed the remaining nest from a distance through a fieldscope and captured several images by digi-scoping. In a moment when the incubating bird stood up to change its sitting position, I managed to see at least 3 pinkish eggs heavily speckled with brown.
[Note: I'm really concerned about active nests as they may easily be disturbed and abandoned. So I observe them from a distance and publish them only after the nesting activity is over, and only if there is an ornithological value.]
Subsequently I spoke with a familiar farmer gentleman who said that they relocated the nest after ploughing the fields and that the bird came back to incubate successfully. Apparently they have saved another nest but were unable to save it from water monitors and crows.
Sadly, on my last visit that was made on 2nd May before publishing this article, the nest was completely vanished. This time too there was a heavy overnight rain on a previous day that may have caused a danger to the nest. On the other hand a group of strangers including kids were planting paddy saplings in the same field at the moment while few BwSs were feeding in other fields. |