Jacana

What is Jacana?

A jacana is any of several species of tropical wading birds belonging to the family Jacanidae within the order Charadriiformes. These birds are often referred to as “lily-trotters” because they are uniquely adapted to walk on floating vegetation in coastal freshwater marshes and ponds.¹²³

Key characteristics of jacanas include:

• Physical Adaptations: They possess exceptionally long, straight claws and long toes that distribute their weight, allowing them to traverse lily pads and other floating plants. Some species also feature wing spurs.¹³
• Diversity: There are seven or eight species in the family, including the American jacana, the African jacana, the Australian lotus bird, and the pheasant-tailed jacana, which is notable for growing long tail feathers during the breeding season.¹

The name is derived from the Portuguese jaçanã, which originates from the Tupi language.²

How do their long toes help them walk on lily pads?

The long, slender toes and elongated claws of jacanas are specialized adaptations that allow them to walk across floating water weeds and lily pads without sinking.¹⁴

By having such greatly elongated toes, the birds are able to distribute their body weight over a much larger surface area. This increased surface area prevents them from breaking through the delicate floating vegetation, effectively allowing them to “tread” across the surface of the water as they forage for food.⁴¹

What do jacanas typically eat in their wetland habitats?

Why do some jacana species have wing spurs?

Some species of jacana possess wing spurs as a physical characteristic, a trait they share with certain types of plovers. While these spurs are a notable anatomical feature of the family Jacanidae, the specific evolutionary or defensive function of these structures is not detailed in the available records.