Taxon name
Rallus aquaticus
Linnaeus, 1758
Uploaded by
National Red List Database
Taxonomic information
Scientific name
Rallus aquaticus
Linnaeus, 1758
Assessed taxon level
Species
Higher level taxonomic groupings
Vertebrates
Birds
Species authority
Linnaeus, 1758
Taxonomic notes and synonyms listed
Rallus aquaticus and R. indicus (del Hoyo and Collar 2014) were previously lumped as R. aquaticus following Sibley and Monroe (1990, 1993).
Location and scope
Specific locality or subnational name or regional name
United Arab Emirates (the)
Scope (of the Assessment)
National
Countries included within the scope of the assessment
United Arab Emirates (the)
Does the assessment cover a marine EEZ area(s)?
Not_assigned
Conservation Status
Qualifying criteria (if given)
D
Criteria system used
IUCN
(see Assessment details)
Assessment rationale/justification
This species has a very small breeding population in the UAE, which qualifies it for listing as Critically Endangered. However, there is high potential for immigration, which is unlikely to decrease. Therefore, the species's status has undergone a regional adjustment down one category and is listed as Endangered at the national level. Whilst the population trend in the UAE is not known, it is a difficult species to survey for.
Assessment details
Assessors/contributors/reviewers listed
UAE National Red List Workshop
Criteria system used
IUCN
Reference for methods given
IUCN. 2012. IUCN Red List Categories and Criteria: Version 3.1, Second edition. IUCN, Gland, Switzerland and Cambridge, UK. iv + 32pp pp. And IUCN. 2012. Guidelines for Application of IUCN Red List Criteria at Regional and National Levels: Version 4.0. Gland, Switzerland and Cambridge, UK: IUCN. iii + 41pp.
Further information
Endemism (according to assessment)
Endemic to region
Not assigned
Taxon distribution as listed in assessment
This species is rare to very uncommon in the UAE (Pedersen et al. 2017). The majority of observations of the species within the country are likely to be of migrant individuals and winter visitors from breeding grounds in central Asia, Iran, Kashmir and western China (Jennings 2010, Pedersen et al. 2017), but it is still irregularly seen. However, between 2007 and 2018, the species has been recorded 13 times in total between August and May in Abu Dhabi (Al Wathba Wetland Reserve, Ruwais, Sila, Al Ain), Dubai (near Dubai City), Ajman (Ajman City, Al Zorah) and Ras al-Khaimah emirates (Ras al-Khaimah Khor) (Pedersen et al. 2017), and there is a small breeding population in the UAE; the first breeding was observed in Ruwais (Abu Dhabi Emirate) in 1995 (Pedersen et al. 2017).
Is there a map available in assessment?
Yes
Habitat and systems
Ecological system type
Habitat
Habitat details as listed in assessment
This species inhabits brackish or freshwater ponds with dense vegetation in the water and on the borders, particularly reed beds, marshes and ditches (Richardson 1990, Jennings 2010, Aspinall and Porter 2011). During migration, it may also occupy mangroves, saline lakes and tidal pools (Jennings 2010). It forages in shallow water, in mud or on land, where it takes items from the water surface or from the ground (Jennings 2010). The species regularly uses well-defined paths between favoured food sources within its habitat (Snow and Perrins 1998, Jennings 2010). There is no information available about its diet in the UAE; elsewhere it is omnivorous, its diet consisting predominantly of animal matter such as worms, leeches, molluscs, shrimps, crayfish, spiders, terrestrial and aquatic insects and larvae, amphibians, fish, birds and mammals (del Hoyo et al. 1996, Snow and Perrins 1998, Taylor 1998). It also takes plant matter including shoots, roots, seeds, berries and fruits (del Hoyo et al. 1996). The species's breeding biology in the UAE and elsewhere in Arabia is poorly known. Based on calling activity on the Saudi Arabian coast of the Arabian Gulf, the breeding period likely starts in February with territory establishment and pair formation; chicks may hatch in April and May and most juveniles are observed in July and August (Jennings 2010). Usually, the nest is a substantial cup of vegetation that is usually positioned in thick stands of reeds or rushes on the ground in or near water, or rarely on a tree stump or in the open (del Hoyo et al. 1996, Taylor 1998).
Threats and conservation measures listed
Threats listed in assessment
The key threats to this species within the UAE come from habitat degradation, via land-use changes, infilling, drainage and potentially pollution (see Aspinall 1996).
History
In 1996, the population size was very small, sufficient to qualify for CR (D). As the species had only just become established as a breeding bird, no regional adjustment is made, unlike for the current assessment.
Publication
Burfield, I.J., Westrip, J., Sheldon, R.D., Hermes, C., Wheatley, H., Smith, D., Harding, K.A. Allen, D.J. and Alshamsi, O. 2021. UAE National Red List of Birds. Ministry of Climate Change and Environment, Dubai, United Arab Emirates