Table 2.

Trap effort (number of trap nights) and number of dispersing deer mice captured by season at a study site near Polson, Montana, USA, August–October 2004 and April–October 2005–2007.

Season	Trap nights	Individual micea	Dispersers	Dispersers/1,000 trap nights
Spring 2005	2,700	554	66	24.4
Spring 2006	2,700	542	76	28.1
Spring 2007	2,700	527	45	16.7
Summer 2004	750	145	11	14.7
Summer 2005	4,050	765	83	20.5
Summer 2006	4,050	896	88	21.7
Summer 2007	4,050	754	77	19.0
Autumn 2004	2,700	489	43	15.9
Autumn 2005	2,700	771	58	21.5
Autumn 2006	2,700	715	37	13.7
Autumn 2007	2,700	583	66	24.4
Total	31,800		650
Average				20.1

^aTotal individuals not reported because some were captured during multiple seasons.