Plants and Animals

Cambarus robustus Big water crayfish

Key Characteristics

Status and Rank

US Status:
State Status: SC - Special Concern (rare or uncertain; not legally protected)
Global Rank: G5 - Secure
State Rank: S2? - Imperiled (inexact or uncertain)

Occurrences

CountyNumber of OccurrencesYear Last Observed
Alcona21968
Arenac21968
Clare21968
Eaton11965
Gladwin32015
Hillsdale11968
Ionia11967
Iosco31968
Kalamazoo11988
Kent12014
Lapeer22015
Lenawee42015
Macomb22015
Midland12015
Montmorency21968
Oakland52018
Presque Isle11968
Sanilac12015
Washtenaw32015

Information is summarized from MNFI's database of rare species and community occurrences. Data may not reflect true distribution since much of the state has not been thoroughly surveyed.

Habitat

Natural Community Types

  • Unknown

For each species, lists of natural communities were derived from review of the nearly 6,500 element occurrences in the MNFI database, in addition to herbarium label data for some taxa. In most cases, at least one specimen record exists for each listed natural community. For certain taxa, especially poorly collected or extirpated species of prairie and savanna habitats, natural community lists were derived from inferences from collection sites and habitat preferences in immediately adjacent states (particularly Indiana and Illinois). Natural communities are not listed for those species documented only from altered or ruderal habitats in Michigan, especially for taxa that occur in a variety of habitats outside of the state.

Natural communities are not listed in order of frequency of occurrence, but are rather derived from the full set of natural communities, organized by Ecological Group. In many cases, the general habitat descriptions should provide greater clarity and direction to the surveyor. In future versions of the Rare Species Explorer, we hope to incorporate natural community fidelity ranks for each taxon.

Management Recommendations

Survey Methods

References