The Northern Cardinal Songbird (Cardinalis cardinalis) is a beautiful North American bird in the genus Cardinalis. This is also known “colloquially” as the redbird...
The Black Sicklebill (Epimachus fastosus) is a big bird of heaven in the mid-mountain forests of New Guinea. The lovely sicklebill's diet contains mostly...
Call/Voice/Sound/Song
House sparrow call consists of various chirping calls. Typical are a strong ‘cheee-ep’, a looser ‘chissick’ and a monotonous ‘chip’. The male gives a...
In the Telescope Mystery, did the Geto Dacians learn about mirrors formed from a reflective liquid over 2000 years ago? The ancients practiced alchemy, such as vaporizing mercury to obtain gold. However, mercury was also used in reflecting telescopes. Similarly, the Geto Dacian...