Reserva Ecológica Costanera Sur

Sitio realizado por aficionados a la observación de aves desde 10 de enero 2006

Amelia's Wattled Jacanas

By the time Amelia discovers this nest there was another family relatively near this one. So, so as not to confuse these families these became Amelia's Jacanas. The nest was nearer the Lizard Path but cattails tampered the view. We had to observe the nest from the sidewalk. The story begins on 15th of February in this way

When I saw the jacana fighting, I first thought it was taking care of the chicks, but when I zoomed the image I realized there were eggs. First some Rose-billed Pochard juveniles came near and then a coot. The jacana got very nervous because the coot was getting too close. When all visitors moved away, the jacana calmed down, checked the eggs and settled to heat them
Video bases on photos
15-2-14 © Amelia Besana
Jacana/Wattled Jacana
The four eggs are exposed and seem to be lying directly on the vegetal material with no added support underneath. This jacana, which so bravely defended the clutch and then sat on the eggs, is the father. In this species the female has a number of males, each in charge of a territory with enough resources to raise the chicks. The female mates with each of the males and takes care of the surveillance of the whole territory besides eating to recover the energy needed for a new egg-laying.
Theis relationship between one female and a number of males is called polyandry. Besides, in this case there is role reversal since it is the male which incubates and raise the chicks.CR

Video based on photos
18-2-14 © Claudia y Tito Di Mauro
On 18th of February Claudia and Tito also detected problems in the neighbourhood. Now it was the turn of the Common gallinule

Jacana/Wattled Jacana4-3-14 © Amelia Besana

Jacana/Wattled Jacana4-3-14 © Amelia Besana
The nest still has the four eggs and is being guarded and cared by the father

Jacana/Wattled Jacana8-3-14 © Amelia Besana

Jacana/Wattled Jacana8-3-14 © Amelia Besana
Our male keeps incubating the four eggs. But it is a short way to go. Let's do the maths. Amelia sent us this finding on February 17th. Up to March 11th it is 22 days. They are about to hatch. Incubation time is 23 to 25 days.

Jacana/Wattled Jacana16-3-14 © Carlos González Ledo
"I could not check what had happened to the jacana eggs. I only saw an adult flying around the nest site. Only when I magnified the pictures did I find that at least three chicks had been born!
The 4-egg nest discovered by Amelia had been successfull", tells us Carlos

Jacana/Wattled Jacana
Jacana/Wattled Jacana22-3-14 © Amelia Besana
By the 22nd of March the jacana chicks are still growing. In the above photo there are only two of them. but in the photo below we can see six legs inside de circle. The adult jacana in a semicrouching position hugs them under its wings.

Jacana/Wattled Jacana
Jacana/Wattled Jacana2-4-14 © Claudia y Tito Di Mauro
Above Amelia's three little jacanas. they are more than three weeks old. Ths juvenile in the bottom photo belongs to another clutch hatched at the beginning of February. That is, they are almost 40 days older.
Jacana/Wattled Jacana
2-4-14 © Claudia y Tito Di Mauro

Jacana/wattled Jacana
Jacana/Wattled Jacana
18-4-14 © J. Simón Tagtachian
This is the last photo we got of the family.