File:Wolzwever - Bombylius Major (51242132621).jpg
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Summary
[edit]DescriptionWolzwever - Bombylius Major (51242132621).jpg |
Dutch/ English De gewone wolzwever (Bombylius major) is een vlieg van het geslacht Bombylius uit de familie wolzwevers (Bombyliidae). De soort komt in Nederland en België algemeen voor op zandige en zonnige taluds langs bosranden en in tuinen. De soort lijkt op een hommel of bij, hoewel deze laatsten vliesvleugeligen zijn, dus geen familie. Deze gelijkenis is geen toeval, maar berust op mimicry; het verschijnsel dat ongevaarlijke soorten op minder onschuldige soorten lijken, zoals ook voorkomt bij de verwante zweefvliegen. Wolzwevers hebben namelijk geen angel, maar hommels en bijen wel. Dieren die graag vliegen eten, maar hommels of bijen vrezen en ontwijken worden zo misleid door de wolzwevers. Vergeleken met hommels is ook de kleur anders, meestal bruin, en de gewone wolzwever heeft geen zwarte, witte of gele kleuren, laat staan patronen. Ook zijn de dunne poten maar juist ook de grote ovale ogen typisch vlieg-achtig. De vleugels staan altijd zijwaarts terwijl veel hommels en bijen deze op de rug vouwen in rust. De lange tong van de gewone wolzwever is ongeveer een derde van de lichaamslengte en dient om dieper in de bloem te komen waar de nectar zit. De larven van de wolzwever groeien op in de nesten van zandbijen. Het vrouwtje bepoedert haar rijpe eitjes eerst met zand zodat ze minder kleverig worden. Ze heeft daartoe een speciaal structuurtje aan het achterlijf. Ze vliegt vervolgens over de nestplaats van een zandbij en blijft even zweven voor de open nestingang om daar met een slingering van haar achterlijf een ei in te werpen The common woolly glider (Bombylius major) is a fly of the genus Bombylius in the family of woolly gliders (Bombyliidae). The species is common in the Netherlands and Belgium on sandy and sunny slopes along forest edges and in gardens. The species resembles a bumblebee or bee, although the latter are hymenopterous, so not related. This resemblance is not a coincidence, but is based on mimicry; the phenomenon that harmless species resemble less harmless species, as also occurs in the related hoverflies. Woolly gliders do not have a stinger, but bumblebees and bees do. Animals that like to eat flies, but fear and avoid bumblebees or bees, are thus misled by the woolly gliders. Compared to bumblebees, the color is also different, usually brown, and the common woolly bumblebee has no black, white or yellow colors, let alone patterns. The thin legs but also the large oval eyes are typical fly-like. The wings are always sideways while many bumblebees and bees fold them on the back when resting. The long tongue of the common woolly glider is about a third of the body length and serves to get deeper into the flower where the nectar is. The larvae of the woolly glider grow in the nests of sand bees. The female first dusts her mature eggs with sand to make them less sticky. It has a special structure on the abdomen for this purpose. She then flies over the nesting site of a sand bee and hovers for a while in front of the open nest entrance to cast an egg there with a swing of her abdomen. |
Date | |
Source | Wolzwever - Bombylius Major |
Author | Paul van de Velde |
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This image was originally posted to Flickr by PAUL (Van de Velde) -Fotografie at https://flickr.com/photos/93438832@N04/51242132621. It was reviewed on 27 November 2022 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
27 November 2022
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current | 07:24, 27 November 2022 | 2,069 × 1,379 (1.87 MB) | Юрий Д.К. (talk | contribs) | Transferred from Flickr via #flickr2commons |
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Camera manufacturer | NIKON CORPORATION |
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Camera model | NIKON D7500 |
Author | PAUL VAN DE VELDE |
Copyright holder |
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Exposure time | 1/2,500 sec (0.0004) |
F-number | f/5.6 |
ISO speed rating | 100 |
Date and time of data generation | 13:33, 23 April 2021 |
Lens focal length | 300 mm |
Width | 5,568 px |
Height | 3,712 px |
Bits per component |
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Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | Adobe Photoshop 22.4 (Windows) |
File change date and time | 20:11, 8 June 2021 |
Exposure Program | Manual |
Exif version | 2.31 |
Date and time of digitizing | 13:33, 23 April 2021 |
APEX shutter speed | 11.287712 |
APEX aperture | 4.970854 |
APEX exposure bias | 0 |
Maximum land aperture | 5 APEX (f/5.66) |
Metering mode | Spot |
Light source | Unknown |
Flash | Flash did not fire, compulsory flash suppression |
DateTimeOriginal subseconds | 90 |
DateTimeDigitized subseconds | 90 |
Color space | Uncalibrated |
Focal plane X resolution | 2,367.8104248047 |
Focal plane Y resolution | 2,367.8104248047 |
Focal plane resolution unit | 3 |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Scene type | A directly photographed image |
Custom image processing | Normal process |
Exposure mode | Manual exposure |
White balance | Auto white balance |
Focal length in 35 mm film | 450 mm |
Scene capture type | Standard |
Scene control | None |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |
Serial number of camera | 6081005 |
Lens used | 55.0-300.0 mm f/4.5-5.6 |
Date metadata was last modified | 22:11, 8 June 2021 |
Unique ID of original document | 9BFB8C25A91FB4A509DDAA26A734A8B9 |
IIM version | 4 |