Protecting Michigan Turtles

By Abby Pointer, MNA Intern

In the state of Michigan we are lucky to be the home of multiple turtle species, from the common snapping turtle to the red-eared slider. With such a diverse potential for habitat, turtles can live in woodlands, grasslands, lakes, rivers, wetlands, and even cities. Unfortunately, some turtles with more specific needs are suffering from habitat destruction and loss, making their survival a bit more difficult. Three of these critters are species of concern, which dictates that they are in need of specific conservation actions, and one species is currently threatened, which is a warning that it is on the brink of becoming endangered. An important way to help conserve these turtles is education, so let’s take a minute to learn how to identify these turtles and their habitat.

eastern box turtle

Eastern box turtle

The first of the four is the eastern box turtle, one of the three species of special concern. Recognized by a helmet-shaped shell with yellow and orange blotches, the eastern box turtle prefers moist, deciduous woodlands with sandy soils and ravines or slopes. Historically, they have been common in eastern Lake Michigan and western Lake Erie woodlands but numbers are steadily decreasing.

 

 

Blanding's_turtle

Blanding’s turtle

Blanding’s turtle, on the other hand, prefers more wetland habitat, a habitat itself that is in need of conservation effort. These turtles can be found in shallow weedy waters of wetlands, marshes, and swamps. Their shell is tall, domed, and of darker coloration. The rest of the skin is also darker, and the under part of its body and neck is a bright yellow color.

 

wood turtle

Wood turtle

The Wood turtle prefers low disturbance, and because of that the species is now quite uncommon in the Great Lakes region. For most of the year, they reside in sandy bottom streams or rivers, but are terrestrial in the summer. Shells of wood turtles are brown or grayish brown, that sits low and central on their back. Their head, legs and tail are typically black while the softer parts of their body are a yellow color.

 

While the previous three turtles were species of special concern, the Spotted turtle is the one threatened turtle in Michigan. These turtles live in clear shallow water with mucky bottoms and much vegetation. Their populations are typically isolated and are found surrounded by areas of unsuitable habitat, and are unfortunately quite rare in the Great Lakes region. These turtles, like their name, are distinguished by small bright yellow spots on their dark colored shell.

michiganspotted-turtle

Spotted turtle

Many of the turtles mentioned above are threatened by wetland drainage and other types of disturbance such as pollution, nest predation, and over-harvest. One of the best ways you can help protect these species is by helping joining a conservation organization, such as the Michigan Nature Association, that supports efforts to protect their depleting habitat. Learn more about protecting and identifying your local turtles by visiting www.herpman.com.

Advertisements

Petition Aims to Protect Amphibians and Reptiles

By Chelsea Richardson

A baby spotted turtle at an MNA sanctuary

A baby spotted turtle at one of MNA’s nature sanctuaries. Photo: Amanda Orban

Sometimes we are so worried about larger animals, we forget about the little guys. Fifty-three of our nation’s reptiles and amphibians are in danger of becoming extinct because of threats to their environment including toxins, global warming, nonnative predators, overcollection, habitat destruction and disease.

On July 11, The Center for Biological Diversity made a huge move to protect amphibians and reptiles in the United States. The petition asks the U.S. Fish and Wildlife Services to protect six turtles, seven snakes, two toads, four frogs, 10 lizards and 24 salamanders.

Scientists estimate that about 25 percent of the nation’s amphibians and reptiles are at risk of extinction, yet only 58 of the approximately 1,400 U.S. species protected under the Endangered Species Act are amphibians and reptiles. The animals included in the July 11 petition will reap lifesaving benefits from the Act, which has a 99 percent success rate at staving off extinction for species under its care.

In Michigan there are three turtles included in the petition; the spotted turtle, the wood turtle and the Blanding’s turtle. The spotted turtle’s loss of habitat is the main cause for the endangered listing for this species. This species is also very sensitive to pollution and toxins and disappears rapidly with the loss of water quality.  Public education is necessary to inform people that populations are declining and efforts should be made to protect this turtle. Habitat and water quality should be monitored in ponds and other water bodies where known populations of spotted turtles live. The spotted turtle is small and has gray to black skin color. Its upper shell is smooth and has up to 100 yellow spots. Continue reading

ENDANGERED!

At MNA, our Mission is to protect special natural areas and the rare species that live there. The goals of our blog are to cover the latest environmental issues affecting these areas and provide information about the efforts of our volunteers. Our weekly “ENDANGERED!” column serves to inform you about the endangered plant and animal species found in and around these special natural areas, and how you can contribute to conservation efforts before it is too late.

Wood Turtle
By Angie Jackson

Turtles have leisurely roamed the earth for more than 200 million years, making them one of the oldest surviving members of the animal kingdom. A fascinating species with the ability to defend itself by withdrawing into a shell, turtles are revered in many cultures as a symbol of longevity, wisdom and stability.

One species in Michigan, the wood turtle (Glyptemys insculpta), is listed as a species of special concern due to activities such as reduction of nesting areas, water pollution, sedimentation and the commercial pet trade.

Physical Appearance:
Wood turtles are medium-sized with a brown, rugged looking carapace (outer shell) marked with distinct yellow and black lines on the ridges. The turtle’s upper head, neck, legs and tail are black, and the rest of its body is yellow or yellowish orange. The entire carapace ranges from 6-10 inches long, and is characterized by raised, pyramidal growth rings on each scale. Young wood turtles are gray or brown with circular, one-inch carapaces and long tails.

Preferred Habitat:
Wood turtles prefer streams, rivers, herbaceous vegetation and sandy nesting places. They can be found near clear, running water in floodplain habitats. Turtles prefer partially shaded and sandy areas with wet herbaceous vegetation such as raspberries, grasses, algae and strawberries. Nesting habitats include cutbanks and sandbars, and when these habitats are not available, wood turtles are known to nest in gravel pits, yards, gardens and even highway bridge crossings.

Life Cycle:
Michigan wood turtles are active from April to early October and they spend most of these months basking on logs, muddy stream banks or forest openings, and feeding. They live in aquatic habitats from fall through spring, when they then move into nearby terrestrial habitats for the summer months. Mating occurs in shallow water during the active season, most frequently in the spring. Wood turtles generally nest in June after sunset, and females produce a clutch of 5-18 eggs each year. The hatchlings are born in late August.

Wood turtles hibernate in mid-October and overwinter in streams with flowing water, often nestling their way into beaver lodges, muskrat burrows or under overhanging roots. Turtles are known for slow growth and long life spans of up to 50 years.

List Status:
In Michigan, wood turtles are listed as a species of special concern. They also occur in Nova Scotia, New Brunswick, Virginia and Pennsylvania. Though wood turtles occur in many counties throughout Michigan, these turtles require specific habitats and may only live in small portions of each county.

Throughout the past 30 years, wood turtle populations in Michigan have significantly declined due to poaching and collecting by the public. In addition, human construction, stream channelization and timber harvesting have led to turtle habitat loss.

Wood turtles are resilient, however. They can thrive with moderate levels of human disturbance and in some cases can even benefit from these activities. Yet, the best way to protect this species is to leave it alone.

Protection Efforts:
In Michigan, regulations on the Take of Reptiles and Amphibians deem it unlawful to take a wood turtle from its habitat unless authorized by a permit. The turtle is also protected by the Convention on International Trade in Endangered Species of Wild Fauna and Flora treaty, which prevents commercial trade of the species and requires illegal collection of the species to be reported to authorities. Human disturbance at nesting sites during the active season should be limited.

MNA protects a number of turtle species at sanctuaries throughout Michigan, including box turtles (Terrapene) and Blanding’s (Emydoidea blandingii). To find turtles, you might visit Lyle and Mary Rizor Memorial Nature Sanctuary, Dauner-Martin Nature Sanctuary, Timberland Swamp Nature Sanctuary, or any of our numerous floodplain and/or wetland properties.

How You Can Help:
MNA volunteers are currently working to protect this and other endangered species, and you can help too. Join our efforts as a volunteer removing invasive plants in the special natural areas where this species lives. Or, become a steward and take responsibility for planning efforts to maintain a specific MNA sanctuary. To find out how to get involved, visit our website.