There are many species in our garden. 
Characteristic: Small slender flies. Different colours. From yellow to black. 
Usually they are difficult to determine from a photo. Length from 4 up to 12 mm. The wing vein M1 is straight and the anal vein long.
They feed on nectar and pollen but there are also predaceous species on small flies. 
When you want to see more species, you can look here. 
The larvae are feeding on plants or decaying organic matter. Sometimes they are miners.

German: Blumenfliegen

1, 2, 3 / 1, 2, 3, 4 = dorsal central hairs.

Difference between Root-Maggot flies (Anthomyiidae) and a house flies (Muscidae). The flies in these two families are quite similar. An important difference is that the root-maggot fly never has more than three dorsal central hairs on the scutum, while the house fly has three or four central dorsal hairs.

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The differences however are very small with the Anthomyia pluvialis / Anthomyia parva Kabos   
A. pluvialis has two names. The first name is the oldest. 
Pluvialis means in Latin rain: It seems to dance before it is raining. Eggs on rotting vegetation. The Limnophora tigrina Family Muscidae is a little bit similar'Photos 28-5-2010, 19-5-2010, 4-4-2011   
Joke van Erkelens: A. pluvialis has a black spot just above the top of the wing is separated from the larger spot above. The two spots of the A. procllaris look like one spot. On the hindtibia of A. procellaris about 5 to 9 dorsal hairs.

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Photos female 11-8-2010. The females are more recognizable than the males. They are shiny dark gray. But the males of many other Root-Maggot Flies are similar. The fly in the photos may be Botanophila fugax. The hair on the legs are correct, but it is certainly not sure! 
    Photos male 14-4-2013 and 4-9-2012.

In the ragwort flowers you often see "foam cups". Under the foam are eggs of a fly. This time I saw also a fly. From a photograph it was not possible to identify the fly well. But I think this fly had laid the eggs on the flower.
 
I have sent some flower heads to Joke van Erkelens. In the flowers the eggs were already hatched into larvae.  She hoped the larvae would pupate and change in a fly. That is not easy, because they overwinter as a pupae. The pupae should not be too warm, not too humid, not too dry.
This year (2013) she has got one fly (a male). To the genitals, she could see, that it was a Botanophila seneciella. That's why I think the fly in the picture is also a Botanophila seneciella.

Photos 36-7-2012. Here more information in Dutch    
  

Lasiomma seminitidum en Lasiomma anthomyinum are very similar. 
But from these flies I know it is a Lasiomma seminitidum. (Thanks Joke) Left the male (photo 19-3-2011) and under the female. (photo 3-7-2011)
This fly is new in the Netherlands. Probably, it is often confused with its well known relative.

The eggs are deposited at the base of plants including cabbage. The larvae are  a pest of crops.
2 - 3 generations a year. Length 4 - 7 mm.  A similar species is Delia platura. Photos 8-5-2013.

Important: Tuft of hairs on the underside (at the beginning) of the hind thigh. Photo 19-4-2014.

Features: The beginning of the wings is yellow. The prealar is long and the femurs are are dark (tibia yellowish) The wings of the fly on these photos look darker than on most images. Photos 4-9-2010.

These flies can be  recognized by the shape of the head. Further determine from a picture is difficult. But Leucophora obtusa can now be determined. A ventral seta on the mid thigh. Scutellum with rows of hairs on the sides and all over very hairy ....

Like for example Nomada (cuckoo bees), they lay their eggs in nests of bees. Photos 28-3-2011.
  

This fly has orange legs. The lower part of the legs is dark. The abdomen is also orange. The thorax is gray with dark stripes. For a root-maggot fly, it is quite large. About 8, 9 mm long. The arista is hairy. See detail photo.
The larvae of M. testacea live in mushrooms. However, they are also found in other organic material. Whether they also live in organic material or that they have been from the mushroom, is not entirely clear.
Photos 15-02-2012. Found in the scullery. I do not know it a hibernating fly, or that the larva has been in the plants, in the scullery.
  

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A small fly. The buds of ivy are 4 mm wide. It was a little hazy. Therefore, the photos are not very sharp. Photos 29-9-2010. 
In 20011, I have taken more photos.

Possible Pegomya bicolor or Pegomya solennis. To see this, you need a good view of the length of the prealar and the colour of the palps. These species are common in the Netherlands and are leafminers. But there are more similar species. Those species are miners on mushrooms. With thanks to Joke van Erkelens.

  Photos 4-11-2011.

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