هازجة النهر

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هازجة النهر

صورة معبرة عن الموضوع هازجة النهر
حالة الحفظ

أنواع غير مهددة أو خطر انقراض ضعيف جدا
المرتبة التصنيفية نوع[1]  تعديل قيمة خاصية (P105) في ويكي بيانات
التصنيف العلمي
النطاق:
حقيقيات النوى
المملكة:
الحيوانات
الشعبة:
الحبليات
الطائفة:
الطيور
الرتبة:
عصفوريات Passeriformes
الفصيلة:
Locustellidae
الجنس:
Locustella
النوع:
هازجة النهر
الاسم العلمي
Locustella fluviatilis
صورة معبرة عن الموضوع هازجة النهر
Range of L. fluviatilis     Breeding      Passage      Non-breeding      Possibly Extant (passage)
تعديل طالع توثيق القالب

هازجة النهر (الاسم العلمي: Locustella fluviatilis) إنگليزية: River Warbler هو طائر ينتمي إلى (فصيلة: Locustellidae).

التصنيف وأصل الاسم

The genus name Locustella is from Latin and is a diminutive of locusta, "grasshopper".[2] This refers to the song of the common grasshopper warbler and some others in this genus.[3] The specific fluviatilis is Latin for "of a river".[2]

It's a monotypic species.[4]

الوصف

This is a largish warbler. The adult has an unstreaked grey-brown back, whitish grey underparts, and a darker undertail, which has white feather tips giving a contrasting pattern. The sexes are identical, as with most warblers, but young birds are yellower below. Some birds can show reduced dark markings on the undertail coverts (caused by more extensive than usual white tips) and thus are closer in appearance to Savi's warbler than typical river warblers. However, they typically still have a streaked breast and more olive colouration on the upperparts.[5]

This is a skulking species which is very difficult to see except sometimes when singing. It creeps through grass and low foliage.

The song is a monotonous mechanical insect-like reeling, often given at dusk. It is similar to the song of other species in the group, but has more of a sewing machine quality, and may be produced for long periods.

البيئة

This small passerine bird is a species found in dense deciduous vegetation close to water in bogs or near a river. Five to seven eggs are laid in a nest in a tussock or on the ground. This species is a rare vagrant to western Europe. In Britain, a small number of males have set up territories in spring, including a bird in Greater Manchester in 1995.[6] One exceptional vagrant was photographed in Gambell, Alaska, in October 2017.[7]

Like most warblers, it is insectivorous.

حالة الحفاظ

The river warbler has an extensive range and a large population size. Although its population trend appears to be declining, the rate of decline is not considered rapid enough to meet the thresholds for Vulnerability. As a result, the species is classified as "Least Concern" on the IUCN Red List.[8]

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مراجع

  1. ^ أ ب ت Imported from Wikidata item: https://www.wikidata.org/wiki/Q747787
  2. ^ أ ب Jobling, James A (2010). The Helm Dictionary of Scientific Bird Names. London: Christopher Helm. pp. 162, 229. ISBN 978-1-4081-2501-4.
  3. ^ قالب:OED
  4. ^ Pearson, David (2020). Del Hoyo, Josep; Elliott, Andrew; Sargatal, Jordi; Christie, David; De Juana, Eduardo (eds.). "River Warbler (Locustella fluviatilis)". Birds of the World (in الإنجليزية). doi:10.2173/bow.eurwar2.01. ISSN 2771-3105.
  5. ^ Normaja, Jyrki (1994) Plumage variation in River Warblers Birding World 7(5): 192–5
  6. ^ Alker, Peter (1995) The River Warbler in Greater Manchester Birding World 8(6):216-7
  7. ^ Benter, Brad (2017-10-08). "North America's first River Warbler". Alaska Rare Bird Alert. Retrieved 2017-10-08.
  8. ^ "River Warbler (Locustella fluviatilis) | Text | BirdLife International". datazone.birdlife.org. Retrieved 2025-01-19.
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