Plants and Animals

Pandion haliaetus Osprey

Key Characteristics

The Osprey is a large (22 -25 in / 56 - 64 cm) hawk with long, narrow wings, dark brown upper parts and white under parts. Its head is white with a dark eye streak. The dark "wrist" patches on the underside of its wings are visible in flight. Females may have dark streaking around their necks and immature bards have pale buff edging on the dark feathers of their upper surface.

Status and Rank

US Status: No Status/Not Listed
State Status: SC - Special Concern (rare or uncertain; not legally protected)
Global Rank: G5 - Secure
State Rank: S4 - Apparently secure

Occurrences

CountyNumber of OccurrencesYear Last Observed
Alger 12 2000
Allegan 1 2017
Alpena 6 2017
Antrim 1 2017
Baraga 6 2000
Barry 3 2017
Benzie 3 1995
Berrien 3 2017
Calhoun 1 2017
Charlevoix 3 2017
Cheboygan 8 2017
Chippewa 72 2006
Clare 3 1993
Clinton 3 2017
Crawford 5 2017
Delta 35 2007
Dickinson 9 2005
Emmet 8 2017
Genesee 6 2017
Gogebic 21 2008
Grand Traverse 3 2017
Gratiot 4 2017
Hillsdale 2 2017
Houghton 1 1983
Ionia 6 2017
Iosco 2 2007
Iron 34 2005
Isabella 1 1992
Jackson 2 2016
Kalamazoo 6 2019
Kalkaska 3 1994
Kent 2 2017
Keweenaw 10 2000
Lapeer 8 2017
Lenawee 3 2017
Livingston 13 2017
Luce 17 2003
Mackinac 42 2001
Macomb 3 2017
Manistee 3 1995
Marquette 12 2012
Mecosta 13 2017
Menominee 1 1994
Missaukee 2 2017
Monroe 15 2017
Montmorency 8 2017
Muskegon 1 1996
Newaygo 1 2016
Oakland 20 2017
Ogemaw 6 2017
Osceola 2 1995
Presque Isle 1 1994
Roscommon 23 2017
Schoolcraft 16 2008
St. Clair 3 2017
Washtenaw 6 2019
Wayne 7 2017
Wexford 1 1998

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

Historically, Ospreys nested only in trees or snags or on cliffs but they have adapted to use some man-made structures such as utility poles and towers, chimneys, windmills, buoys, and platforms. Preferred nest sites are above or near water. Reintroductions have begun in certain areas in southern Michigan in recent years.

Specific Habitat Needs

Snag/cavity needed in: Floodplain forestHardwood-conifer swampNorthern hardwood swampSouthern hardwood swamp.

Natural Community Types

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

Human activity near nesting birds may interfere with nesting success. Maintenance and construction activities should be avoided in a quarter mile radius around active nests between the onset of courtship in April and fledging of young birds in July. Additionally, snags should be left standing along shorelines whenever safety permits, as they are utilized both for nesting and perching while hunting.

Active Period

Migration from fourth week of March to second week of April

Nesting from third week of April to fourth week of July

Migration from first week of September to third week of November

Survey Methods

Osprey are best surveyed by checking lakes, rivers, and reservoirs for foraging adults that may be soaring overhead or perched on a snag, platform, or utility pole. Following adults during the breeding season may lead to the discovery of a nest. Known locations of nests or nesting platforms constructed to attract nesting Ospreys may also be checked as they will commonly use the same nest in successive years.

Visual observation

Survey Period: From second week of May to first week of August

Time of Day: Daytime

References

Survey References

  • Bibby, C.J., N.D. Burgess, and D.A. Hill. 1992. Bird Census Techniques. Academic Press, New York.

Technical References

  • Brewer, R., G. A. McPeek, and R. J. Adams Jr., eds. 1991. The Atlas of Breeding Birds of Michigan. Michigan State University Press, East Lansing. 650pp.
  • Evers, D.C. 1994. Endangered and Threatened Wildlife of Michigan. The University of Michigan Press, Ann Arbor. 412pp.