Black rail

Black rail

Black rail

2 languages
Kingdom
Phylum
Class
Subclass
Infraclass
Superorder
Order
Family
Genus
SPECIES
Laterallus jamaicensis

The black rail (Laterallus jamaicensis ) is a mouse-sized member of the bird family Rallidae.

Appearance

The black rail is a small black bird with a short bill. Black rails usually weigh 29-39 g, are 10-15 cm in length, and have a wingspan of 8.7-11.0 in (22-28 cm).The body is dark, with white speckles along the back and wings. Both the beak and legs are dark. Adults have a red eye that appears around 3 months of age.

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It will often make its presence known with its distinctive ki-ki-krr call or an aggressive, presumably territorial, growl. This is primarily uttered during the night, when these birds are most vocal. The peak of vocalization is during the first two weeks of May, when breeding and courtship behaviors are also at their peak.

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Distribution

Geography

It is found in scattered parts of North America, the Caribbean, and the Pacific region of South America, usually in coastal salt marshes but also in some freshwater marshes. It is extinct or threatened in many locations due to habitat loss. The largest populations in North America are in Florida and California.

Black rail habitat map
Black rail habitat map
Black rail
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Habits and Lifestyle

The black rail is rarely seen and prefers running in the cover of the dense marsh vegetation to flying.

Seasonal behavior
Bird's call

Diet and Nutrition

The black rail is an opportunistic feeder and consumes a wide range of food. Its diet includes seeds, insects, crustaceans and mollusks. The black rail forages by feeding along the water lines after high and low tide.

Mating Habits

This rail is territorial during the breeding season, and occasionally males will mate with two or more females. The nests of this bird are placed on the ground, in dense, swampy vegetation or in patches of flooded grass. The nests are bowl-shaped and built with vegetation loosely woven.

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The clutch of this bird usually consists of six to eight creamy white speckled, with reddish-brown spots, eggs. These eggs are roundish and measure around 23 by 17 millimetres (0.91 by 0.67 in). They are incubated by both parents, taking shifts of approximately one hour each, for 16 to 20 days. The precocial young then hatch.

In 2015, the first ever breeding by black rails in South Carolina was captured through a  camera study. This species was once thought to be a non-breeding visitor to the state.

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Population

Population threats

Under the IUCN Red List, the black rail is listed as endangered with decreasing populations. The IUCN estimates there are between 28,000 and  92,000 mature individuals remaining. The largest threats to the Black Rail are habitat destruction and severe weather events.

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The wetland habitat that the black rail depends on has steadily declined through the last several decades, due to draining for development and conversion to agricultural land.  

In addition to declining populations and increasing threats, the black rail is also impacted by the lack of scientific studies available. Because of the secretive and hard to observe nature of the bird, there is very little known about them to help prevent population decline.  

They are preyed upon by many avian (hawks, egrets, and herons) and mammalian (foxes and cats) predators, and rely on the cover of thick marsh vegetation for protection. High tides are a dangerous time for black rails, as they are quite vulnerable to predation outside the marsh.

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References

1. Black rail Wikipedia article - https://en.wikipedia.org/wiki/Black_rail
2. Black rail on The IUCN Red List site - https://www.iucnredlist.org/species/22692353/154165751
3. Xeno-canto bird call - https://xeno-canto.org/652768

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