Silkie that are 32 ounces (910 grams). Silkie plumage was once unique among chicken breeds, however in recent years silkie feathering has been developed in several breeds, mostly notably the Chabo, where it is now standardised in Britain and the Netherlands. It has been compared to silk, and to fur. The overall result is a soft, fluffy appearance. Their feathers lack functioning barbicels, and are thus similar to down on other birds. This characteristic leaves Silkies unable to fly. Silkies appear in two distinct varieties: bearded and non-bearded. Bearded Silkies have an extra muff of feathers under the beak area that
Bird vocalization and prevent an energetically costly fight . In birds with song repertoires, individuals may share the same song type and use these song types for more complex communication. Some birds will respond to a shared song type with a song-type match (i.e. with the same song type). This may be an aggressive signal, however results are mixed. Birds may also interact using repertoire-matches, wherein a bird responds with a song type that is in its rival's repertoire but is not the song that it is currently singing. This may be a less aggressive act than song-type matching. Communication through bird