Editing Welcome swallow (section)

==Description==
The welcome swallow is a small fast-flying bird. Its flying style is circular in pattern with swift darting motions. It has graceful shape and flight, moreover it often flies singly, in couples or in clusters.<ref name=nzbirdsonline>{{cite web|url=http://nzbirdsonline.org.nz/species/welcome-swallow |title= Welcome swallow | website= New Zealand Birds Online | access-date=5 May 2015}}</ref>  The welcome swallow is metallic blue-black above, light grey below on the breast and belly, and rusty on the forehead, throat and upper breast. It has a long forked tail, with a row of white spots on the individual feathers. These birds are about {{convert|15|cm|in|abbr=on}} long, including the outer tail feathers which are slightly shorter in the female. The welcome swallow's weight is about 9-20g. From the Gould collection in Tasmania a “natural size” male had a wing size of {{cvt|11.1|cm}}, tail size of {{cvt|7.4|cm}}, and a culmen of {{cvt|0.7|cm}}. While the female has {{cvt|10.9|cm}} wings, a {{cvt|6.25|cm}} tail, and a culmen of {{cvt|0.7|cm}}.<ref name=" Meyer ">{{cite journal| last=Meyer | first=de Schauensee. R | year=1957 | title= On some avian types, principally Gould's, in the collection of the academy | journal=Proceedings of the Academy of Natural Sciences of Philadelphia | volume=109 | pages=123–246}}</ref> The [[bird vocalization|call]] is a mixture of twittering and soft warbling notes, and a sharp whistle in alarm. However, their call is normally quiet and does not travel very far.<ref name=nzbirdsonline/>

Young welcome swallows are buffy white, instead of [[rufous]], on the forehead and throat, and have shorter tail streamers.