Phenology Table for Family Heptageniidae (Flat-headed mayflies)

Numbers of Specimens Sampled Per Month at Each of Four Elevation Ranges
Meters Elev Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Elev Total
1 to 499m 0 0 0 0 57 37 74 21 65 0 0 17 271
500 to 999m 27 7 15 15 147 318 372 287 205 20 10 63 1,486
1000 to 1499m 0 0 0 0 8 192 270 102 51 0 12 5 640
1500m or more 0 0 0 0 1 0 0 0 0 0 0 0 1
Totals >>> 33 7 15 15 422 715 776 421 381 35 25 86 2,931

 

 

 

 

* Note: numbers of data records without elevations are included in the totals row.