Stamp: Hartlaub's Duck (Pteronetta hartlaubii); 1981 imprint (Sierra Leone 1981)
Hartlaub's Duck (Pteronetta hartlaubii); 1981 imprint (Sierra Leone 1981)
21 December (Sierra Leone ) within release Definitives - Birds goes into circulation Stamp Hartlaub's Duck (Pteronetta hartlaubii); 1981 imprint face value 1 Sierra Leonean leone
| Stamp Hartlaub's Duck (Pteronetta hartlaubii); 1981 imprint in catalogues | |
|---|---|
| Michel: | Mi: SL 601II |
| Stamp Number: | Sn: SL 474a |
| Yvert et Tellier: | Yt: SL 496 |
Stamp is horizontal format.
Inscribed with year 1981. Numerous commercial covers exist with issues from this series.Also in the issue Definitives - Birds:
- Stamp - Black Bee-eater (Merops gularis); 1981 imprint face value 2;
- Stamp - Black Crake (Limnocorax flavirostra); 1981 imprint face value 50;
- Stamp - Blue Quail (Synoicus adansonii); 1981 imprint face value 15;
- Stamp - Blue-breasted Kingfisher (Halcyon malimbica); 1981 imprint face value 40;
- Stamp - Denham's Bustard (Neotis denhami); 1981 imprint face value 5;
- Stamp - Great Blue Turaco (Corythaeola cristata); 1981 imprint face value 30;
- Stamp - Hartlaub's Duck (Pteronetta hartlaubii); 1981 imprint face value 1;
- Stamp - Spur-winged Goose (Plectropterus gambensis); 1981 imprint face value 5;
- Stamp - Timneh Parrot (Psittacus timneh); 1981 imprint face value 10;
Stamp Hartlaub's Duck (Pteronetta hartlaubii); 1981 imprint it reflects the thematic directions:
Animals are multicellular, eukaryotic organisms of the kingdom Animalia (also called Metazoa). All animals are motile, meaning they can move spontaneously and independently, at some point in their lives. Their body plan eventually becomes fixed as they develop, although some undergo a process of metamorphosis later on in their lives. All animals are heterotrophs: they must ingest other organisms or their products for sustenance.
Birds (Aves), a subgroup of Reptiles, are the last living examples of Dinosaurs. They are a group of endothermic vertebrates, characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight skeleton. Birds live worldwide and range in size from the 5 cm (2 in) bee hummingbird to the 2.75 m (9 ft) ostrich. They rank as the class of tetrapods with the most living species, at approximately ten thousand, with more than half of these being passerines, sometimes known as perching birds. Birds are the closest living relatives of crocodilians.
