GrasshopperOrder Orthoptera (various species)
01Overview
Grasshoppers represent one of the most important terrestrial food sources for freshwater gamefish, particularly trout, bass, and panfish. These large, protein-rich insects become a staple food item when they accidentally fall or are blown into streams, rivers, and lakes during the peak summer and early fall months. Unlike aquatic insects that emerge from the water, grasshoppers are accidental visitors to fish habitat, making their presence both opportunistic and highly anticipated by both fish and anglers.
Grasshoppers belong to the order Orthoptera and encompass numerous species across North America, from the common field crickets to the massive Mormon crickets of the western United States. The most relevant species for fly fishing include various Melanoplus species, Dissosteira carolina (Carolina grasshopper), and Schistocerca americana (American grasshopper). These insects are particularly abundant in agricultural areas, meadows, and grasslands adjacent to fishing waters.
The importance of grasshoppers to anglers cannot be overstated. During peak hopper season, typically from mid-July through September, fish will actively patrol shallow areas near grassy banks, waiting for these terrestrial morsels to become available. This creates some of the most exciting and visual dry fly fishing opportunities of the year, as anglers can often witness explosive takes on the surface.
Effective grasshopper patterns include the Hopper Juan, which excels during mid-summer through early fall along grassy banks, and the Foam Body Hopper (BC), designed to float high and maintain visibility in turbulent water. For challenging conditions or when fishing fast water blind, the Hi-Vis Foam Hopper provides excellent visibility and buoyancy in meadow streams.
Species that actively feed on grasshoppers include virtually all freshwater gamefish. Brown trout and rainbow trout are particularly fond of hoppers, often abandoning their typical feeding lanes to intercept these large insects near the surface. Smallmouth bass and largemouth bass will aggressively attack hopper patterns, while bluegill and other panfish provide consistent action on smaller hopper imitations.
Understanding grasshopper behavior enhances fishing success significantly. These insects are most active during warm, sunny days and become sluggish during cool mornings and evenings. Wind is a critical factor, as it dislodges hoppers from vegetation and carries them onto the water. The best hopper fishing often occurs on breezy afternoons when insects are being blown from adjacent grasslands onto the water.
For additional scientific information about grasshopper biology and identification, consult BugGuide's comprehensive Orthoptera section, Montana State University's grasshopper management guide, and University of Nebraska's grasshopper research database. The USGS Northern Rocky Mountain Science Center provides valuable insights into grasshopper population dynamics and distribution patterns.
02Lifecycle
Unlike aquatic insects, grasshoppers undergo incomplete metamorphosis (hemimetabolism), consisting of three distinct stages: egg, nymph (several instars), and adult. Understanding this terrestrial lifecycle helps anglers predict when and where these insects will be most available to fish.
Egg Stage (September–May): Adult females deposit eggs in soil during late summer and early fall using their specialized ovipositor. Eggs are laid in protective foam masses called pods, typically 1-2 inches below the soil surface in areas with suitable vegetation. These eggs overwinter and remain dormant through the cold months, with development resuming when soil temperatures consistently reach 60-65°F in spring.
Nymph Stage (May–July): Grasshopper nymphs hatch in late spring and early summer, appearing as miniature versions of adults but lacking fully developed wings and reproductive organs. They progress through five molting stages (instars), growing larger with each molt. During this period, nymphs remain close to hatching areas and are rarely available to fish, as they cannot yet jump significant distances or fly.
Adult Stage (July–October): This is the stage of primary interest to fly fishers. Adults emerge with fully developed wings and jumping legs, reaching peak numbers in mid to late summer. Size varies considerably by species, from small 12-14mm individuals to massive 40-50mm specimens. Adults are most active during warm daylight hours when temperatures exceed 70°F.
Seasonal Availability: Peak fishing occurs from mid-July through September when adult populations reach maximum density and insects are most active. Early season (July) typically features smaller, more numerous individuals, while late season (August-September) produces larger specimens but often in lower numbers. Temperature plays a crucial role – grasshoppers become inactive below 60°F and are most active between 75-90°F.
Weather Influence: Wind is perhaps the most important factor affecting availability to fish. Moderate winds (5-15 mph) dislodge insects from vegetation without preventing their activity, creating ideal conditions. Strong winds can ground hoppers entirely, while calm conditions keep them safely on land. Barometric pressure changes associated with approaching weather fronts often trigger increased activity.
Daily Activity Patterns: Grasshoppers follow predictable daily rhythms. They remain inactive during cool morning hours, becoming active as temperatures rise after 10 AM. Peak activity occurs during warm afternoons (1-4 PM), with activity declining as evening temperatures drop. This pattern directly correlates with the best fishing opportunities.
03Habitat
Grasshoppers inhabit terrestrial environments adjacent to fishing waters, making their habitat preferences crucial for successful angling strategies. These insects thrive in areas with abundant grasses, forbs, and low shrubs, particularly native grasslands, agricultural fields, meadows, and rangeland. The proximity of these habitats to streams, rivers, and lakes determines the likelihood of hoppers becoming available to fish. Ideal grasshopper habitat features diverse plant communities with varying heights and structures. Native bunch grasses, agricultural crops like alfalfa and wheat, and weedy areas provide both food resources and shelter. Areas with moderate grazing pressure often support higher grasshopper densities than heavily grazed or ungrazed lands, as some disturbance creates the habitat diversity these insects prefer. Geographically, grasshoppers are found throughout North America, but abundance varies significantly by region and elevation. Prairie states and the Great Plains support the highest densities, while mountainous areas above 8,000 feet typically have fewer species and shorter activity seasons. Western rangelands, agricultural valleys, and riparian meadows adjacent to trout streams create ideal conditions for both grasshopper populations and fishing opportunities. Microhabitat selection varies by species and life stage. Adults prefer areas with scattered vegetation that provides both food and escape cover, avoiding dense forests or completely barren ground. South-facing slopes with good sun exposure support higher populations, as these areas warm quickly and extend the active season. Edge habitats where grassland meets water are particularly productive, as they concentrate insects near fishing areas while providing the terrestrial habitat they require.
04Identification
Identifying grasshoppers relevant to fly fishing requires attention to size, coloration, behavior, and seasonal timing. These characteristics directly influence fly pattern selection and fishing strategies.
Physical Characteristics
- Size Range: Fishing-relevant grasshoppers range from 12mm (size 14-16 hooks) for small species to 50mm (size 4-6 hooks) for large species like Mormon crickets
- Body Structure: Distinctive large hind legs for jumping, relatively large head with prominent eyes, and well-developed wings in adults
- Coloration: Varies from bright green in grass-dwelling species to brown, tan, or mottled patterns in ground-dwelling varieties
- Wing Patterns: Many species display distinctive wing markings, particularly visible during flight – some show bright colors or contrasting bands
Behavioral Identification
- Jumping Ability: Powerful hind legs allow jumps of 10-20 times their body length – this explosive movement often triggers fish strikes
- Flight Patterns: Short, erratic flights typically under 50 feet, often ending in crash landings on water surfaces
- Activity Timing: Most active during warm, sunny periods; sluggish during cool mornings and evenings
- Sound Production: Many species produce distinctive chirping or clicking sounds, particularly males during mating
Species-Specific Features
- Field Crickets: Dark brown to black, 12-20mm, produce loud chirping sounds
- Carolina Grasshoppers: Mottled brown with distinctive black and yellow wing bands visible in flight
- Differential Grasshoppers: Large (30-45mm), yellow with distinctive black chevron markings on hind legs
- Mormon Crickets: Massive (40-50mm), flightless, dark coloration with prominent shield-like pronotum
On-Water Recognition
When grasshoppers land on water, they typically struggle vigorously, creating surface disturbances that attract fish. Fresh specimens float high with legs and antennae clearly visible above the surface film. As they become waterlogged, they sit lower in the surface film with only the back and wing cases visible. This progression from high-floating to flush-floating appearance should influence fly selection during different phases of a hopper fall.
Seasonal timing provides additional identification clues. Early season hoppers (July) are typically smaller and more numerous, while late season specimens (August-September) are larger but less abundant. Weather patterns, particularly wind direction and intensity, significantly influence when and where hoppers will be available to fish.