Data Zone
Justification of Red List category
This species has an extremely large range and the population size is extremely large, hence does not approach threatened thresholds for the range or population size criteria. The population trend is not known, but the population is not believed to be decreasing sufficiently rapidly to approach the thresholds under the population trend criterion. For these reasons the species is evaluated as Least Concern.
Population justification
In Europe, the total population size is estimated at 6,510,000-13,600,000 mature individuals, with 3,250,000-6,770,000 breeding pairs (BirdLife International 2021), and comprises approximately 30% of the species' global range, so a very preliminary estimate of the global population size is between 21,700,000-45,300,000 mature individuals, although further validation of this estimate is desirable. In Europe the trend for this species is not known (BirdLife International 2021). As no other data are available to derive trends, the global population trend for this species is unknown.
Trend justification
.
This species breeds in North Africa, south-east Europe, parts of the Arabian Peninsula and central Asia; it winters south of the Sahara to East Africa.
This species prefers trees and tall bushes in a variety of habitats: dense gardens, parks, riverine forest, often of poplars (Populus), also dense tall bushes or trees at lakesides, orchards and plantations, including young pine trees (Pinus). It is also found in maquis of oak (Quercus), roses (Rosa), low pines, brooms (Cytisus), acacias (Acacia) and similar. Breeding occurs from May to June and clutches are three to five eggs. The nest is a strong cup of plant stems and soft twigs, lined with plant down fur and placed in fork of branch, commonly of tamarisk (Svensson 2006). The diet comprises mainly of invertebrates but also some fruit in the late summer. The northern race is a long-distance migrant, wintering in east and north-east Africa and locally in south-west Arabia. Birds breeding in North Africa spend the non-breeding season in the Sahel zone or in Sudan and Eritrea. In the south of the range, laeneni and alulensis and probably southern populations of pallida and reiseri are resident or only make small movements (Svensson 2006).
Widespread destruction of its habitat threatens this species in some areas. The clearance and burning of bushes, groves and hedges, and the drainage of of land for agricultural expansion has intensified within its European range. Pesticide use may also adversely affect populations. Factors in the wintering quarters including droughts and pesticide use may be responsible for the annual fluctuations of populations in Greece (Tucker and Heath 1994).
Conservation Actions Underway
CMS Appendix II. Bern Convention Appendix II. There are currently no known conservation measures for this species within Europe.
Conservation Actions Proposed
Traditional, low-intensity farming should be maintained and the retention of a high groundwater-table along river valleys and around lakes along with the conservation of moist scrub habitats in plains is essential. A programme of census and monitoring studies should be undertaken for this species (Tucker and Heath 1994).
Text account compilers
Martin, R., Rutherford, C.A.
Contributors
Dowsett, R.J.
Recommended citation
BirdLife International (2024) Species factsheet: Eastern Olivaceous Warbler Iduna pallida. Downloaded from
https://datazone.birdlife.org/species/factsheet/eastern-olivaceous-warbler-iduna-pallida on 22/12/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from
https://datazone.birdlife.org/species/search on 22/12/2024.