Northern Jacana

Quick Take

• This bird's family structure flips everything you expect. The males handle all the childcare, but there's a cunning reason the females set it up that way. Polyandrous mating explained →
• Northern jacanas carry a hidden weapon on their bodies that most birds don't have, and they need it more than you'd think. Wing spurs and defenses →
• Walking on water sounds like a superpower, but for the northern jacana it comes with a serious vulnerability hiding in plain sight. Predators in the marsh →
• The northern jacana rarely flies, and while it certainly can, the reason it holds back reveals how it survives in a marsh full of predators. Why it wades over flying →

The northern jacana (Jacana spinosa) is a medium-sized wader. It inhabits marshes and swamps near coastal areas, where it spends its days walking across floating vegetation and picking insects off aquatic plants. This species is relatively social and lives in small colonies, where the fathers raise their young, and the females distribute their egg clutches among multiple males.

5 Amazing Northern Jacana Facts

• The northern jacana is one of two species of jacanas found in the Americas, from the United States to Panama.
• This jacana species is distinguishable by the yellow wattle on its forehead and the yellowish-green flight feathers.
• These birds are relatively social and live in small colonies, with a dominant female at the head.
• They are nonmigratory but may occasionally wander north to the Southern United States.
• Males and females give alarm calls and charge at intruders.

Where to Find the Northern Jacana

The northern jacana is found from Mexico through Central America to Panama, and occasionally as a vagrant in the southern United States. Its population is most concentrated from Mexico to Panama, and individuals only occasionally wander to the southern United States in Texas, Arizona, and Florida. You will often find this bird near coastal areas in marshes, swamps, ponds, and lake margins. Their habitats must contain floating plants such as lily pads and water hyacinths. In the United States, you can spot them in shallow freshwater ponds.

Nests

Males make loosely constructed platforms on floating aquatic vegetation. Occasionally, they add plants around the eggs as nesting material to help conceal them. 

Classification and Scientific Name

The northern jacana (Jacana spinosa) is from the Charadriiformes order, which contains 390 bird species that live near water and eat invertebrates. The Jacanidae family encompasses the jacanas, a group of tropical waders. The genus, Jacana, comprises the American species, including the northern and wattled jacana. 

Size, Appearance, & Behavior

The northern jacana is a medium-sized wader, measuring eight inches long and weighing between three and five ounces, with a 20-inch wingspan. They have a small yellow wattle on their foreheads and bony spurs on their wings to defend themselves from predators. Males and females have similar coloring, which includes dark brown bodies, yellow bills, and black necks and heads. Their primary and secondary feathers are yellowish-green and visible when in flight. They emit “clustered note calls” when with their young or their mating pair. They will also make alarm calls when threatened. This species is relatively social and occurs in small colonies with a dominant female. Like other jacanas, the northern jacana is a weak flier and prefers to wade rather than fly.

Migration Pattern and Timing

These birds do not regularly migrate, but they may occasionally stray to Texas, Arizona, and Florida after a season of good rainfall.

Diet

Northern jacanas are carnivores that primarily eat insects.

What Does the Northern Jacana Eat?

The northern jacana’s main prey is aquatic insects, but they also consume small fish, snails, worms, crabs, mollusks, and seeds. They forage by walking on floating vegetation and picking insects off plants or the water’s surface. You may also find them in the mud or open ground near water.

Predators, Threats, and Conservation Status

The IUCN lists the northern jacana as LC or “least concern.” Due to its extensive range and significant population size, this species does not meet the “threatened” status thresholds. While they are not experiencing any existential threats, they may be susceptible to losing their wetland habitats in the future.

What Eats the Northern Jacana?

Northern jacana predators include boa constrictors, snapping turtles, birds of prey, and various mammals. Purple gallinules, a crane-like rail species, are their most significant nest predators. These birds will steal eggs and young when the male jacana is away. To defend themselves and their young, northern jacanas spread their wings, give repeated alarm calls, and charge at intruders.

Reproduction, Young, and Molting

The breeding season varies throughout its range but usually coincides with the rainy season. Northern jacanas participate in a polyandrous mating system, in which the females copulate with several males to spread their egg clutches around, and the males are solely in charge of caring for the eggs and raising their young. Females lay four eggs, and males incubate them for approximately 28 days. Although the young leave the nest 24 hours after hatching, they are fiercely protected until they are around eight weeks old. They may stay under the protection of their father for up to one year. Jacanas cannot establish their own territories until they are at least two years old. These birds have an average lifespan of 6.5 years.

Population

The global northern jacana population is estimated to be 500,000 to 5 million mature individuals. Their population trend—whether increasing or decreasing—is unknown due to uncertainty about the impacts of habitat modification. However, there do not appear to be any extreme fluctuations or fragmentations in their numbers.