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Assessing Breeding Populations of Ducks by Ground Counts

Table 10

Table 10. Changes in five population components of mallards at five different periods on single days during laying and early incubation, Kindersley Study area, 1959.

	0800 hours					1300 hours					1800 hours
	Prs.	Lone Males	Grp. Males <5	Lone Females	Grp. birds	Prs.	Lone Males	Grp. Males <5	Lone Females	Grp. birds	Prs.	Lone Males	Grp. Males <5	Lone Females	Grp. birds
May 11	61	53	53	1	9:0	80	35	52			98	35	45
May 15	42	44	61		4:1	55	45	58		5:1	53	33	28	1
May 16	42	44	66			50	37	56			67	29	19	2
	0530 hours					1530 hours
	Prs.	Lone Males	Grp. Males <5	Lone Females	Grp. birds	Prs.	Lone Males	Grp. Males <5	Lone Females	Grp. birds
May 16	18	42	64			73	41	44
% all birds	25	30	45			63	18	19
Ratio	100:	233:	356			100:	56:	60

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