Table 1. Years and seasons during which we monitored various packs for prey acquisition rate and probability of attendance (PA).

Pack	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009
Agate											L
Blacktail												E	L,S
Druid	E	L,E	L,E	L,E	L,E	L,E	L,E	L,E			L,E	L,E	L
Everts													L,S
Geode							L,E	L,S1,E	L
Hellroaring									E	L,E
Leopold	E	L,E	L,E	L,E	L,E	L,E	L,E	L,E	L,S1,E	L,E	L,S1,E	L,S
Oxbow											E	L,S
Rose	E	L,E	L,E	L,E	L,E	L
Slough									L,E	L,E

The seasons that we monitored various packs were late winter (L), summer (S), and early winter (E). We determined PA for two wolves in each pack during every season that a pack was monitored except for summer periods marked as S¹. During summer periods marked as S¹, only one GPS-collared wolf was present in the pack. We determined prey acquisition rates during all summer periods that we monitored a pack of wolves.