Shotwellia isleta (Shotwell's Range Grasshopper)

Kingdom: Animalia

Phylum: Arthropoda

Class: Insecta

Order: Orthoptera

Family: Acrididae

Genus: Shotwellia

Species: isleta

Shotwell's Range Grasshopper - Shotwellia isleta

329383

Species Extent (New Mexico)

Male body length to end of forewings is 31-33mm long (Otte, 1984).

Global Rank: G1

State Rank: S1

Rank Metadata
State Rank: S1	Rank Changed: 05/05/2025
Rank Reviewed: 02/08/2018
Reason: This species has a very small Area of Occupancy of just 5km2 and is also only known from five occurrences in New Mexico. Given the large Extent of Occurrence for this species it is likely that more surveying may increase the species Extent of Occurrence and number of occurrences however, the species is highly threatened and lives in a specialized habitat so it is unlikely to dramatically increase. Furthermore, the opinion of local species experts states that the species should be considered Critically Endagered and declining (David Lightfoot Pers. Comm). Due to the threats of cattle grazing and drought this species has an inferred continuing decline in the extent and quality of its habitat. As a result, this species is currently assessed as S1 in New Mexico. However, a reassessment should be done if more information becomes available.

Ecological Factors
Specificity: Narrow. Specialist or community with key requirements common.	Range Extent: 5000-20,000 square km (about 2000-8000 square miles)
Occurences: 1 - 5	Population Size: Unknown
Area of Occupancy: Only five observations of this species have been made in New Mexico resulting in an Area of Occupancy of just 4km2 which was calculated on GeoCat based off of points aggregated by a local grasshopper expert (D. Lightfoot Pers. Comm).	Threat Summary: N/A

State Status:

Federal Status:

USFS Status:

BLM Status:

SWAP Status:

NMRP Strategy Status:

Number of Subpopulations: 1

Number of Mapped Locations: 1

Number of Observations: 3

Observation date range: 07-26-1983 to 07-29-1986

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