Issued in 2007, the first pair of stamps depicts the boreal or tengmalm's owl (Aegolius funereus). Next is the long-eared owl (Asio otus) followed by the little owl (Athene noctua), both issued in 2007 too. Finally, the tawny owl (Strix aluco) stamps were issued in 2009. All four species have been presented in the past.

Thank you Gerda!

The common buzzard (Buteo buteo) lives in most of Europe, vast areas of Asia and many populations migrate to Africa. It has over ten subspecies. It preys on birds, mammals, reptiles, amphibians, insects and, rarely, fish.

We have seen the Eurasian hobby (Falco subbuteo) before.

The stamps belong to a set of five issued in 2010 by Belgium.

This is my favourite cover from Belgium which is also very well canceled. We have already seen all the stamps here except for the last one which was released in 2005. Cirl Bunting (Emberiza cirlus) lives in southern Europe, north Africa and in the Mediterranean Islands. It feeds on invertebrates, grain and small seeds.

Little Owl (Athene noctua): The stamp was issued in 2007. This owl has a few subspecies and it is a member of the Stringidae family. It feeds on insects, earthworms, amphibians, small birds and small mammals.
Willow Tit (Poecile montanus): The stamp was issued in 1997 and it is in Belgium's old currency. This endangered species lives in Europe and it feeds on insects, caterpillars and seeds.
Spotted or Eurasian Nutcracker (Nucifraga caryocatactes): The stamp was released in 2008. This bird lives in Asia and Europe. It has ten subspecies. It feeds on seeds of pines, insects, small birds, eggs, nestlings, small rodents and carrion.

Unfortunately this cover was machine canceled and not all stamps have been canceled. I will write only about the three birds that did not appear in the previous cover.
Eurasian Jackdaw (Corvus monedula): The stamp was issued in 2007. It lives in western Asia, Europe and north Africa. It has four subspecies. It is an opportunist feeder. It eats food waste, a wide variety of plant material and invertebrates.
Common Snipe (Gallinago gallinago): The stamp was issued in 2003. This small wader bird lives in northern Asia and northern Europe in marshes, bogs, tundra and wet meadows. It is a migratory species. It has two subspecies. It is a game bird.
Eurasian Woodcock (Scolopax rusticola): This stamp was issued in 2009. It lives in temperate and subarctic Europe and Asia. The northern populations are migratory. It feeds on earthworms, insects and larvae, freshwater mollusks and some plant seeds. It is more active at dawn and dusk. It is a game bird.

A nice cover from Belgium both machine and hand canceled.
Common Nightingale (Luscinia megarhynchos): The stamp was issued in 2004. This species with the melodic voice lives in forests and scrub in Europe and south-west Asia. In the winter it migrates to southern Africa. It is considered to be an Old World Flycatcher.
Boreal or Tengmalm's Owl (Aegolius funereus): The stamp was released in 2007. This species lives in Asia, North America and Europe. It feeds on voles and other mammals, birds, insects and other invertebrates.

A very nice postcard from Belgium but unfortunately machine canceled. The owl stamp was issued in 2009. The tawny owl (Strix aluco) is of medium size. It lives in woodlands in Europe and Asia. It has 11 subspecies, it doesn't migrate and it is very territorial. As most owls, it is a nocturnal bird. It hunts rodents, birds, small mammals, earthworms and beetles.

In 2010 Belgium issued a high value stamp and an ATM label showing the barn owl (Tyto alba). The ATM commemorates the Birdpex Expo which was held in Brussels on 9-12 of April 2010.
This owl is the most widespread of all birds. It has many subspecies, it is a nocturnal bird of prey as most owls and it eats small birds and mammals, toads, insects etc. Although it is not threatened globally, in many places the barn owl faces constant poisoning.