Table 1.

Proportion of tissue samples from northern pintails wintering in the Central Valley of California detected as positive for haemosporidian infection using molecular techniques.

	2006–2007 muscle	2011–2012 muscle	2011–2012 blood
Proportion hematozoa + (%)	72/146 (49.3%)	37/157 (23.6%)	38/157 (24.2%)
Proportion Leucocytozoon + (%)	71/146 (48.6%)	35/157 (22.3%)	33/157 (21.0%)
Proportion Haemoproteus + (%)	3/146 (2.1%)	2/157 (1.3%)	3/157 (1.9%)
Proportion Plasmodium + (%)	6/146 (4.1%)	2/157 (1.3%)	5/157 (3.2%)
Proportion co-infected by > one parasite lineage	25/146 (17.1%)	8/157 (5.1%)	10/157 (6.4%)
Proportion co-infected by > one Leucocytozoon lineage	20/146 (13.7%)	8/157 (5.1%)	9/157 (5.7%)
Proportion co-infected by > one Haemoproteus/Plasmodium lineage	1/146 (0.7%)	0/157 (0%)	0/157 (0%)
Proportion co-infected by ⩾ one Leucocytozoon and ⩾ one Haemoproteus/Plasmodiumlineage	8/146 (5.5%)	2/157 (1.3%)	4/157 (2.5%)