| 31. | In combination with the Dark budgerigar mutation the body feathers become deeper shades of blue.
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| 32. | Because the Dark factor is always visibly expressed no budgerigar can be split for Dark.
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| 33. | Because the Violet factor is always visibly expressed no budgerigar can be split for Violet.
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| 34. | Because the Anthracite factor is always visibly expressed no budgerigar can be split for Anthracite.
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| 35. | From 1925 Duncker collaborated with Carl Hubert Cremer and extended his experiments to include budgerigars.
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| 36. | But only the creme de la creme of parakeets, or budgerigars, will be considered.
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| 37. | The condition is caused by young budgerigars slipping repeatedly on the floor of a nest box.
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| 38. | Birds include the Australian hobby, nankeen kestrel, spotted harrier, mulga parrot and budgerigars.
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| 39. | I was recently given a budgerigar.
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| 40. | Currently, most owners wishing to obtain an Anthracite need to import these budgerigars from Germany.
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