JACANA SPINOSA PDF

Northern Jacana. Jacana spinosa. At marshy ponds from Mexico to Panama, this odd shorebird is common. Its long toes allow it to run about on lily pads and. Jacana spinosa. Cirujano, gallito de agua, mulita, jacana centroamericana. Information · Images · Ocurrences · Map · Literature. Loading. Northern jacanas (Jacana spinosa) range from Mexico to Panama, although they are sometimes seen into the southern United States. They occur mainly in.

Author: Gusar Akikasa
Country: Sierra Leone
Language: English (Spanish)
Genre: Literature
Published (Last): 9 February 2017
Pages: 307
PDF File Size: 4.4 Mb
ePub File Size: 5.19 Mb
ISBN: 395-1-54737-520-7
Downloads: 83647
Price: Free* [*Free Regsitration Required]
Uploader: Mazil

Northern jacanas Jacana spinosa range from Mexico to Panama, although they are sometimes seen into the southern United States. They occur mainly in coastal areas. Jenni and Mace, ; Kaufman, Northern jacanas inhabit many types of wetlands including; ponds, marshes and lake margins. Pond edges with abundant floating vegetation are favored.

Northern jacanas occasionally forage in wet grassy areas and flooded fields.

Northern Jacana (Jacana spinosa) :: xeno-canto

Northern jacanas are medium sized wading birds with long legs and extremely elongated toes. Adults are relatively dark overall; they have a black neck, head and breast. The back, undersides, and tail are dark rufous. They have a yellow bill with a white base and a yellow shield on the forehead. Juveniles are bi-colored with a white underside and a darker back, head, and neck.

Juveniles have a white supercilium and white lores. Both adults and juveniles have conspicuous yellow flight feathers that are visible when they raise their wings. Northern jacanas average mm in length with a wingspan averaging mm. Males were found to be significantly smaller than females. A study from Costa Rica showed that females weighted Jenni and Collier, ; Sibley, The breeding system in northern jacanas is unusual and is an example of polyandry.

Both males and females will defend territories against other members of the same sex.

Females mate with up to four individual males and lay eggs as frequently as every nine s;inosa. Males may be polygamous when new females arrive. When northern jacanas breed, males build platforms that are used for solicitation displays and copulation. The platforms are then used as nests. The female or the male may solicit spinoxa each other and this behavior leads to copulation.

Solicitation is done by calling or posturing and it can be initiated by the male or the female. When the female assumes a pre-copulatory position, the male may fly up 10 meters or more before flying back down, landing on her back or landing alongside and hopping on her back.

Biodiversity of Costa Rica

The male may initiate a mating event by assuming the pre-copulatory position and the female then joins him. Most copulation attempts are unsuccessful. When they are successful, the male gives distinct calls.

Solicitation and copulation occur less often once a male has eggs in his nest, but may occur again when the young are 4 to 5 weeks old. Although northern jacanas are capable of breeding all year long, they usually breed at the beginning of the rainy season. During that time, females mate with up to four males and lay eggs as frequently as every nine days. Males may be polygamous when new females arrive, but extra pair copulations are not known to occur when the female holds her territory.

  INTERMEDIATE ALGEBRA ANGEL RUNDE PDF

As in many other members of the order Charadriiformesfour eggs are typically laid per clutch. The male typically sits on the eggs and adds nesting material in the form of aquatic plants periodically.

The female may visit the nest site on occasion and shade the eggs. The eggs hatch in around 28 days. The young leave the nest around 24 hours spijosa hatching and will follow the male to good foraging spots. Because females may have several mates, some or all of the young that he raises may not be his.

The development time in northern jacanas is slow; young fledge in around 8 weeks and may stay in their natal territory for more than 12 months. Jenni and Collier, ; Jenni and Mace, In northern jacanas, males exclusively construct nests, incubate eggs, and care for the young.

Females do not help to raise offspring generally, but slinosa provide some defense against predators. Males build a jafana on the platform that was used for solicitation and copulation.

After the female lays eggs in the nest the male continues to build the nest by flinging material over his shoulder in the direction of the nest site.

Brooding is mainly done in the morning and evening. During rainy conditions, cool temperatures and times of increased cloud cover, the amount of time spent brooding increases. The young leave spimosa nest at about 24 hours after hatching. At that point the male leads the nestlings to good foraging sites and continues to protect them. Betts and Jenni, ; Jenni and Mace, ; Sibley, Little is known about lifespan in northern jacanas. One male held his territory for 6.

Jenni and Mace, Northern jacanas are jaxana social and frequently occur in small colonies with a dominant female and 1 to 4 males. Northern jacanas are diurnal and spend much of their time walking on emergent vegetation and searching for aquatic insects and seeds.

They pick food off of the surface of plants, the surface of the water, or just below the water. Their feet are highly specialized for this foraging behavior.

Their small size and large feet allow these javana to exploit this foraging habitat, as they can easily support their weight on surface aquatic vegetation. Jenni and Collier, ; Kaufman, Northern jacanas have specific home territories that they spinpsa for breeding and feeding. Male territories averaged 0. Female territories contain between one and four males, which they breed with. Females help in maintaining the dpinosa of the males by intervening on behalf of the resident male when there is a territorial dispute with another male.

If the female loses her territory to another female, then the newcomer will have access to the males in that territory. Male territories may last considerably longer than female territories. A male in Costa Rica held a territory for 6. Northern jacanas communicate with visual displays and calls. Repeated-note calls are given in a wide variety of situations. Notes with high amplitude, note length, and duration are used when the bird is under physical attack or when it can’t fend off jqcana intruding conspecific.

  EQUILIBRIO DE PODER TOM CLANCY PDF

The nature of the repeated note calls say a lot about the intention of the caller. Northern jacanas also communicate by giving groups of notes. This is most often given by males when his chicks are near.

Flight calls are also given. Threat displays are given by outstretching the wings and pointing them forward. Males may do a submissive display in the presence of females in which they crouch down.

During the submissive display the male swings his head laterally while the female pecks at the base of his neck. Northern jacanas eat whatever jaana they jcaana glean off of aquatic plant surfaces. They turn over floating plants using their feet and bills while searching for insects hiding on the under-surface Sibley They also eat flowers that are opened by purple gallinules Porphyrio martinica.

Adults will occasionally take small fish. Jenni and Collier, macana Osborne and Bourne, Possible dpinosa include boa constrictors Boa constrictorspectacled caimans Caiman crocodilussnapping turtles Chelydra serpentina and various raptors and mammals.

Purple gallinules Porphyrio martinica are the most common predators of northern jacana eggs and offspring, they will take them out of nests when the male is away. For this reason, northern jacanas will attack purple gallinules when they see them in their territory.

Spjnosa consist of aerial attacks and charging with wings spread on the substrate. Attacks are accompanied by repeated-note calls. Jenni and Mace, ; Stephens, Northern jacanas are presumably important secondary consumers in the marshy habitats they inhabit.

Given the fact that they are relatively small, endothermic animals, they presumably have a high caloric requirement. Because of this, jacanas probably control insect populations. Northern jacanas also contribute to the energetic needs of purple gallinules Porphyrio martinica. Although northern jacanas provide spinosaa direct benefits to humans, they jacaan certainly a source of enjoyment for naturalist and birders. There are no known adverse effects of northern jacanas on humans.

Northern jacanas appear to be common throughout most of their range, but could become vulnerable with loss of wetlands. Lindsay editor, instructorNorthern Michigan University. This includes Greenland, the Canadian Arctic islands, and all of the North American as far south as the highlands of central Mexico.

Northern Jacana (Jacana spinosa) in Costa Rica

Animals with bilateral symmetry have dorsal and ventral sides, as well as anterior and posterior ends. Synapomorphy of the Bilateria. Ecotourism implies that there are existing programs spknosa profit from the appreciation of natural areas or animals.