Table 2. The assigned phylotypes and OTU abundance in the cockatiel microbiome.

Phyllum	Class	Order	Family	Genus	OTUs number	Frequencya (%)
Firmicutes					16,287	90.5
	Erysipelotrichi	Erysipelotrichales	Erysipelotrichaceae		8,072	57.4
	Clostridia	Clostridiales	Lachnospiraceae	Clostridium	759	17.1
	Bacilli	Lactobacillales	Lactobacillaceae	Lactobacillus	6,919	15.0
	Clostridia	Clostridiales	Clostridiaceae	Ca. Arthromitus	73	0.67
Tenericutes					1,300	6.3
	Mollicutes	Mycoplasmatales	Mycoplasmataceae		1,295	6.3
Spirochaetes					754	1.5
	Brevinematae	Brevinematales	Brevinemataceae	Brevinema	753	1.5
Proteobacteria					732	1.4
	γ −Proteobacteria	Enterobacteriales	Enterobacteriaceae	Serratia	359	1.0
Cyanobacteria					41	0.191
Bacteroidetes					60	0.036
Actinobacteria					22	0.024
Other					83	0.051
Total					19,279	100%

Notes.

^aA total of 295,217 sequencing reads were clustered into 19,280 non-redundant OTUs using a 97% identity threshold. The frequency column was calculated using the total number of sequencing reads assigned to a phylotype or OTU for each described level.