Species at Risk Public Registry - COSEWIC Assessment and Status Report on the Bank Swallow Riparia riparia in Canada - 2013

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> COSEWIC Assessment and Status Report on the Bank Swallow Riparia riparia in Canada - 2013 - Table 2

**Table 2. Regional variation in the proportions of natural and artificial (human-made) sites used by Bank Swallows in Canada (Erskine 1979).**
	Proportion of assignable nests
Region	Natural sites	Artificial sites	Total nests	Mean colony size	Proportion of nests unassigned
Maritimes provinces	0.75	0.25	8207	56	0.01
Quebec and Ontario	0.35	0.65	9934	38	0.39
Prairie provinces	0.57	0.43	509	5	0.00
British Columbia	0.13	0.87	8568	59	0.35
All regions	0.4	0.6	27218	42	0.29