why did passenger pigeons go extinct

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
why did passenger pigeons go extinct	1.75	0.2	9278	20	36
why	0.29	0.4	6431	2	3
did	1.23	0.8	5875	50	3
passenger	1.34	0.1	7703	84	9
pigeons	2	0.9	3533	93	7
go	0.34	0.6	7006	33	2
extinct	1.73	0.6	9951	29	7

Keyword	CPC	PCC	Volume	Score
why did passenger pigeons go extinct	0.47	0.7	2716	71
when did passenger pigeons go extinct	1.87	0.8	3747	91
why did the passenger pigeon go extinct	0.88	0.9	5752	32
when did passenger pigeon go extinct	0.01	0.7	1318	94
what caused the passenger pigeons extinction	0.39	0.4	9370	85
passenger pigeon extinction reasons	0.47	0.9	7976	46
extinction of the passenger pigeon	1	0.5	6496	28
when did the passenger pigeon go extinct	1.42	1	563	71
how did passenger pigeons go extinct	0.77	0.9	6325	33
when did the passenger pigeon go extinct date	0.59	0.3	3722	39
why are passenger pigeons extinct	0.66	0.9	9847	59
extinction of passenger pigeon	0.75	1	1621	40