Another long legged fly. It  is related to the family Chironomidae (Non-Biting Gnats or Midge Flies)
No fear, it is a  non-biting fly.
I don't know wich species. A common window gnat is Sylvicola fenestralis. In the Netherlands are six species.
They have 16 segments of the antenna.
They have got their name because they are attracted to light especially  illuminated windows.  
Their color also can be reddish.
This photo is from March 2009

The larvae lives of vegetable waste.

German: Fenstermücken 

March 2009.  
I have in the garden a trunk of a dead apple tree. There ofen are different species of flies on it.  Two little gnats (5 mm) were walking on this trunk. 
There are many little gnats, belonging to the family Sciaridae   Usually they are not  to determine from a photo. Length  1 mm to 7 mm. They also are non-biting flies. Ze steken niet.Larvae often live in decaying organic material.
The same month I found a much smaller species. About 2 mm.

St Mark's flies are no flies. They are gnats. You can see them in the early spring (often in groups). The males have larger bulbous eyes than the females.
The larvae feed on decaying organic matter and on the roots of grasses.  

Length 8 - 10 mm. April, May

Geman: Märzfliege, Märzhaarmücke, Markusfliege oder Markushaarmücke French: Mouche de la Saint-Marc

Characteristic: Wings with a small round discal cell.
But that is not to see this picture.

Broad Centurion, Green Soldier Fly (Chloromyia formosa)
Family: Soldierflies (Stratiomyidae)

This is a male. Not only because the eyes, but also because the shiny yellow gold abdomen. Females have a metallic bluegreen abdomen. The legs are black with yellow knees.
It's a beautiful fly.
Length 7-9 mm, April-August.
The larvae live in damp soil, compost and leaf litter and they feed on decaying vegetable matter.

German: Goldgrüne Waffenfliege  French: Chloromyie agréable

It has two spots on its face.

This is a male. A male has an orange spot on its abdomen.
The abdomen of the females are entirely greenis brown.
Length to 16 mm. 
The larvae live in manure.
In September I oft have these beautiful flies in the garden.

German: Dungwaffenfliege 

Dark green. The adomen is black.

I have photgaphed this Beris chalybata  on April 30 
This fly was about 10 mm

German: Fruehe Schmalwaffenfliege

Anthrax anthrax  Genus Anthrax.  Familiy Bee flies (Bombyliidae). 

The wings are mostly black. It flutters, when it flies.
The larvae of Antrax anthrax are nest parasites of solitary bees.

Conops quadrifasciatus Family Thick-headed flies, Conopid flies (Conopidae)

There are some similar species. Conops quadrifasciatus has orange, yellow legs.
Their larvae are endoparasites of bumble bees of the genus Bombus.

Length: 9 - 16 mm

German:  Vierstreifige Dickkopffliege 

A reddish brown Conopid fly. 

The larvae are endoparasites of bumblebeesof the genus Bombus.  

May - September

Europe.

  Photo 27-6-2010

German: Gemeine Breitstirnblasenkopfliege

Physocephala rufipes Familie Blaaskopvliegen - wespvliegen (Conopidae)

Physocephala rufipes has a small, long second segment. The other segments are broader and shorter.  
Under the antennae is a black stripe. 

Other species in the Nettherlands are: Physocephala nigra (rare), Physocephala chrysorhhoea, Physocephala vittata. 

The larvae are endoparasites of Sphecidae, bees, bumble bees and social wasps.

Length: 9 - 13 mm.

This fliy was very striking that day between the hoverflies. 
It is very easy to recognize by the red back with the black stripe in the middle and the stiff hairs.
The larva of the Tachina fera feed on caterpillars. The eggs are laid on the leaves. The larvae move towards their host and get into their body. After about two weeks, it changes into a fly.
Larvae of other Tachina species parasites on larvae of other insects.

Length: 9 - 16 mm

German: Igelfliege  

Ernestia rudis 

Another relative of theTachina fera  If you compare them, you see they are family.

It also has the stiff hairs like the Tachinidae. The antennae are smaller. In the Netherlands there are 7 species.
The larvae are parasitoids of woodlice.
Parasitoids like tthe larvae of the Tachinidae.
  The first two flies are males. Tthe third fly is a female.  The last fly a female. They are slightly sexual dimorph. 

Two other photos:   

Dungfly (Scathophaga stercoraria) 
Photos of the Dungfly. March, April 2009.  Of course you see them much more often in the meadow. They catch other flies, but sometimes they feed on nectar. 
On this photos with many pollen. Flower: Pilewort (Ficaria verna)
        

Scathophaga stercoraria German: Gelbe Dungfliege, Gemeine Kotfliege  French: scatophage du fumier, mouche à merde

It has got this name because the larvae parasite on slugs.

They look similar on the family Scathophaga

This fly resembles the flies above. Notable are the ‘spines’ on the wing edge.
Suillia species are oft in the neighbourhood of mushrooms. Therefore you can find them mainly in autumn.
Many larvae of these species are also found in mushrooms.

Greenbottle Family Blow-fly (Calliphoridae) 

The name blow-fly comes from an older English term for meat that had eggs laid on it. Flies in this family are often metallic in appearance.
Maybe Greenbottle (Lucilia caesar) Greenbottles are found everywhere. On carrion, dung, but also on flowers.  The larvae feed on carrion and adults visit flowers for nectar.
It has a beautiful metallic bluish green colour. This is the most widespread and common species. As always there are similar species.

German: Goldfliege  

More information about Blow-flies (Calliphoridae) on my site:  Subpage: Blow-flies (Calliphoridae)

Common Awl Robberfly (Neoitamus cyanurus)

  Neoitamus cyanurus male

German: Gemeine Strauchdieb 

with prey

Length 12 -14 mm.

Other  resembling species: Dioctria rufipes,  Dioctria linearis.

   

German: Gewürfelte Tanzfliege

Common stiletto fly  (Thereva nobilitata) Family Therevidae

From this family, there are many small species. The Common stiletto fly is larger. But there there are similar species. It is not quite sure.
The English name refers to the narrow, tapering abdomens. The dense short golden hair looks like felt. (Dutch name translated: felt fly) Between the eyes of the female are two dark spots.
Length 10 - 13 mm.
May - September

The larvae often live in sandy soil with leaf-litter. The predaceous larvae eat especially beetles larvae. But I also have read they are omnivorous. So I am not sure.

  The male. Photo 19-6-2010.

Lauxaniidae, Minettia longipennis
In May I see many Minettias in the garden. A dark fly with very light wings.

The small flies in this family are very similar. (Therefore spec.) Flies are yellow with black stripes.
These photos were taken in April. In April there are many grassflies in the garden. They are slowly flying above the plants.
The larvae of the grass fly live in grass stems.
Length: 2, 3 mm.

In Februari 2009 I saw some dung flies between the fallen leaves.You can see the thick thigs. They move by little jumps. 

A shiny dark fly with a prominent spot on the wings. He looks like a Lesser dung fly.
As a lesser dung fly you can find the larvae in manure and decaying material..

Length 5 to 6 mm.
May-September

       

Length about 4 mm.
Europe

          Photo 10-7-2010.

It is a shiny green fly like the Greenbottle. 
It also has black bristle-like hair on the thorax. But in the center are some hairs missing. That 's a difference.

Sarcophaga carnaria is the most common species, but there are more similar species.

Characteristics: Stripes de thorax, red eyes and a checkerboard like pattern on the abdomenen.

The flies feed on nectar and pollen.

The larvae are parasites. Furthermore, I 've found different descriptions in books and sites. There are written about food sources such as earthworms, insect larvae, pupae, but also dead animals.

German: Fleischfliegen  

There are different species. 

It is a small mobile fly. In the sun, its face looks like a light. That is characteristic to all family members. The bottom picture is vague. But you can see the light face.

There are many species in our garden. 
Characteristic: Small slender flies. Different colours. From yellow to black.
Usually they are not to determine from a photo.
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

Family: Small flies. Mostly grey - black.
The larvae live in decaying organic matter

Characteristic to theFannia lustrator are the orange legs..

A striking orange fly.  It has few brushes and clear wings. The length of this fly was about one cm. 

The larvae of the carrot flies are fytofaag (plant eating). They live in the roots, bulbs and non-woody stems.