The bellbirds, Procnias spp, are passerinebirds found in South America that are noted for their far-carrying bell-like call. They are members of the Cotinga family.
With Bellbird coal calculated at 125 tons per acre for each 1 inch of thickness, the later formed Bellbird Pillars measuring 44 yards by 44 yards were estimated to contain 19,166 tons of coal each.
The second method adopted by the Bellbird Colliery was the progressive withdrawal of the old wooden skip and the replacement by slightly larger capacity steel skips.
In the development of Bellbird Colliery workings, in the driving of bords and headings and after the formation of the pillars, these pillars were divided off into panels for later working by pillar extraction, and were given by barrier pillars.
The Bearded Bellbird, Procnias averano, is a passerinebird which breeds in tropical northern South America.
The female builds a twig nest in tree; one mottled, pale brown egg is laid and incubated entirely by the female, leaving the polygamous male free to spend much of his time advertising with his distinctive songs.
These arboreal bellbirds mostly eat fruit and berries, taken on the wing; Lauraceae and Burseraceae are particularly favoured, and the young are fed regurgitated Lauraceae by the female.
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