Nocturnal migratory flight initiation in reed warblers Acrocephalus scirpaceus
: effect of wind on orientation and timing of migration

Wing lengths of Clamorous Reed Warblers Acrocephalus stentoreus in Israel Wing length measurements taken from first-year, pre- and post-moulting (annual, complete) Clamorous Reed Warblers were recorded at a site in northern Israel. The resulting data set was examined using a time-series of residuals (CUSUM). Results from this analysis can explain the reported heterogeneity found in a comparable data set by Merom et al. (1999). Further observations made in their paper are rebutted: (1) an implied assumption that Reed Warbler (Acrocephalus scirpaceus) spring migration in Israel ends by 1 May is contrary to other publications; (2) the late autumn occurence in N Israel of longer-winged 1st cal. yr. Reed Warblers, unconvincingly explained as either delayed migration by larger individuals or post fledging feather growth, is most likely due to birds from different provenances origins moving at different seasons; (3) growth during adulthood in Reed Warbler is not a new discovery, though presented as such.

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Faculty Opinions recommendation of Flight initiation by male Rhodnius prolixus is promoted by female odors.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.2869958.2536056 ◽

2010 ◽

Author(s):

Martin Giurfa

Keyword(s):

Rhodnius Prolixus ◽

Flight Initiation

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Acrocephalus scirpaceus: BirdLife International

IUCN Red List of Threatened Species ◽

10.2305/iucn.uk.2017-1.rlts.t22714722a111801786.en ◽

2016 ◽

Author(s):

Keyword(s):

Acrocephalus Scirpaceus

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Starting a new life in the South? Swiss, Dutch and Flemish ageing in Morocco: a lifecourse perspective

Ageing and Society ◽

10.1017/s0144686x20001804 ◽

2021 ◽

pp. 1-27

Author(s):

Claudio Bolzman ◽

Tineke Fokkema ◽

Ibrahima Guissé ◽

Danique van Dalen

Keyword(s):

Social Relationships ◽

Social Life ◽

Home Country ◽

Early Adulthood ◽

Standard Of Living ◽

Professional Experiences ◽

The Social ◽

Timing Of Migration ◽

Tourism Economy ◽

Second Chance

Abstract This article focuses on European migrants living in Morocco and now near retirement or retired. Using a lifecourse approach we are interested in whether their timing of migration to Morocco made a difference in terms of their motivations to settle there and subsequently with the social relationships at the destination. To this end, we conducted 36 biographical interviews with Swiss, Dutch and Belgian Flemish migrants aged 50 and older. Findings show the relevance of a lifecourse perspective for international migration studies. Early adulthood migrants to Morocco had no strong obligations in their home country and were ready to explore new affective or professional experiences in a new country. They had the time to discover and find a place in Moroccan society and to develop long-lasting social relationships with kin and non-kin. Middle-adulthood migrants moved with the intention of rapidly accessing a higher standard of living thanks to the tourism economy, with hedonistic perspectives in a setting with a better climate. Their social life is limited to interaction with business clients and a few like-minded migrants from Europe, and their communication with personnel is a daily challenge. Most late-in-life migrants experienced disruptive life events before migrating, and expected to find in Morocco a second chance to build a better life. They generally move in select circles of European expatriates.

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European birds adjust their flight initiation distance to road speed limits

Biology Letters ◽

10.1098/rsbl.2013.0417 ◽

2013 ◽

Vol 9 (5) ◽

pp. 20130417 ◽

Cited By ~ 48

Author(s):

Pierre Legagneux ◽

Simon Ducatez

Keyword(s):

Habitat Structure ◽

Territory Size ◽

Speed Limit ◽

Vehicle Speed ◽

Flight Initiation Distance ◽

Speed Limits ◽

Behavioural Responses ◽

Road Speed ◽

Flight Initiation ◽

Local Speed

Behavioural responses can help species persist in habitats modified by humans. Roads and traffic greatly affect animals' mortality not only through habitat structure modifications but also through direct mortality owing to collisions. Although species are known to differ in their sensitivity to the risk of collision, whether individuals can change their behaviour in response to this is still unknown. Here, we tested whether common European birds changed their flight initiation distances (FIDs) in response to vehicles according to road speed limit (a known factor affecting killing rates on roads) and vehicle speed. We found that FID increased with speed limit, although vehicle speed had no effect. This suggests that birds adjust their flight distance to speed limit, which may reduce collision risks and decrease mortality maximizing the time allocated to foraging behaviours. Mobility and territory size are likely to affect an individuals' ability to respond adaptively to local speed limits.

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