(A) Host	Site sampled	Number sequences	Number OTUs	Median sequence length (bp)	Figure 1A label
Adelie penguin	Faecal	48	44	846	Banks, 2009
Capercaillie	Cecum	114	43	1476	Wienemann, 2011
Chicken	Cecum	329	213	433	Zhu, 2002
	Illeum/Cecum	99	72	644	Lu, 2003
	Cecum	74	52	1404	Bjerrum, 2006
	Crop/Cecum	39	27	850	Gong, 2007
	Cecum	627	137	301	Torok, 2011
Crane	Faecal	16	7	817	Ryu, 2012
Hoatzin	Crop	1235	376	1365	Godoy-Vitorino, 2008
	Crop	2123	267	1338	Godoy-Vitorino, 2010
Kakapo	Crop	29	6	728	Waite et al., 2012
	Faecal	73	17	740	Waite et al., 2012
Shorebirds*	Cloaca	64	34	192	Santos, 2012
Gull	Faecal	117	85	780	Lu, 2008b
Parrot*	Cloaca	49	39	684	Xenoulis, 2010
Ostrich	Cecum	310	98	889	Matsui, 2010
Turkey	Cecum	657	139	1450	Scupham, 2007
	Faecal	688	423	472	Lu, 2008a
	Cecum	104	67	1454	Scupham, 2008