Phenology Table for Family Hydropsychidae (Retreat-making caddisflies)

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 1 1 62 32 91 28 55 2 1 6 279
500 to 999m 22 5 8 59 87 315 428 257 237 44 7 33 1,502
1000 to 1499m 0 0 0 1 1 124 152 66 47 1 8 7 407
1500m or more 0 0 0 0 0 1 4 1 2 0 1 0 9
Totals >>> 25 6 10 62 315 604 737 366 398 60 20 46 2,649

 

 

 

 

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