Stomoxys

Stomoxys calcitrans (stable flies) Russell, Ontario Stable flies appear in traps in late June or early July and reach high numbers only very late in the season, often reaching a peak just before truly cold weather sets in. The end of the flight season is difficult to specify as stable flies can be seen landing on traps on warm afternoons right up until winter, even if they are not caught. Captures at my home 1 km from the nearest cattle are male-biased overall (71.2%, N=10,812 to 2008), with a strong seasonal trend (July 81%, August 80%, September 73%, October 58%).
Average daily catches by months in a standard cotton drill Nzi trap Biosensory octenol lure was used in 2002

Summary Statistics for ALL trap and bait combinations Interpret relative to approximate number of traps used each year
Year	First Capture	Last Capture	Flight Season (days)	Daily Max Catch	Date of Max Catch	Total catch for year
2001 - 1	30 Jun	6 Nov	130+	13	15 Sep	228
2002 - 2	27 Jun	14 Oct	110+	71	13 Sep	1,436
2003 - 5	30 Jun	18 Oct	111+	36	18 Sep	1,253
2004 - 7	24 Jun	13 Oct	110+	31	4 Aug	4,165^†
2005 - 10	13 Jul	5 Nov	116+	18	6 Oct	570
2006 - 7	23 Jun	21 Oct	121+	17	5 Aug	802
2007 - 9	3 Jul	27 Oct	117+	44	26 Sep	928
2008 - 4	7 Jun	24 Oct	138+	56	5 Sep	1,061
^† Sticky Traps used late in the year resulting in a very high total, max refers only to Nzi traps