The Thick-billed Raven (Corvus crassirostris), a Corvid from the Horn of Africa, shares with the Common Raven the distinction of being the largest in the family (60-64 cm in length and 1.5 kg) and indeed the largest of the bird order Passeriformes (perching birds). It has a very large bill that is laterally compressed and is deeply curved in profile giving the bird a very distinctive appearance. This bill is black with a white tip and has deep nasal grooves with only light nasal bristle covers.
It has very short feathers on the head, throat and neck which on the throat and upper breast, have an oily brown gloss. The rest of the bird is glossy black except for a distinctive white patch of short feathers on the nape and onto the neck.
Through thick & thin: designed with circuit layouts that put heat exactly where you want it, thin- and thick-film heaters provide direct and directional heating. How do you choose between thin- and thick-film designs?(Heaters)
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