duluthfrogblog.blogspot.com
Duluth Frog Blog: About
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This is the personal blog of Jennifer Olker. I hope to get you interested in amphibians that may in your own backyard: listening for them, looking for them, and learning more about their significance in the world. Why are amphibians important? Amphibian declines could mean loss of species diversity, declining populations of common species, and indicate. Potential losses of other organisms in both aquatic and terrestrial ecosystems. To learn more about amphibian declines see AmphibiaWeb. How to conduct fr...
duluthfrogblog.blogspot.com
Duluth Frog Blog: Fairy Shrimp
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Friday, April 27, 2012. Fairy shrimp are small crustaceans that live in the same small temporary wetlands that wood frogs use for breeding. These aquatic critters are fascinating to watch as they swim around upside down with their many leaf-like or feathery legs. I recently found large numbers of fairy shrimp swimming around developing wood frog eggs. There were hundreds of them! I had never seen this before, so I tried to capture some pictures. 15 fairy shrimp next to wood frog egg mass.
duluthfrogblog.blogspot.com
Duluth Frog Blog: July 2011
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Saturday, July 23, 2011. Less than three months after the eggs were laid, young wood frogs are emerging from ponds and wetlands around Duluth. Wood frog metamorphosis occurs fairly quickly and can be easily observed in pond edges. Over the last two weeks wood frogs in Hartley Park transformed from 2 inch long tadpoles into froglets about 3/4" long. Wood frog at Gosner stage 40/41. Hindlimbs are fully developed, forelimbs are about to emerge from under skin. Another wood frog at Gosner stage 45. Wood frog...
duluthfrogblog.blogspot.com
Duluth Frog Blog: April 2011
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Monday, April 25, 2011. Spring peepers ( Pseudacris crucifer. Started calling today in Duluth. Although spring peepers have a loud voice, these frogs are pretty small at full size. Adult spring peeper in hand for size reference. Adult spring peeper in wetland. Spring peeper - identifying marks: X on back, toe pads, small size, light color. These frogs are great at hiding - I rarely spot them in wetlands, but there are a lot of videos up on UTube. Friday, April 22, 2011. Wood frogs are explosive communal ...
duluthfrogblog.blogspot.com
Duluth Frog Blog: May 2011
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Monday, May 23, 2011. Before this foggy thunderstorm rolled into Duluth, the amphibians were very busy. In the last two weeks, three species have begun calling: Northern leopard frog ( Rana pipiens. American toad ( Bufo americanus. And gray tree frog ( Hyla versicolor. Around Boulder Lake, the Northern leopard frogs. Started and finished calling in just four days. This species is considered an early breeding species, but tends to breed at few weeks after wood frogs in the northern reaches of Minnesota.
duluthfrogblog.blogspot.com
Duluth Frog Blog: July 2012
http://duluthfrogblog.blogspot.com/2012_07_01_archive.html
Tuesday, July 17, 2012. Stories of frog malformations. Whatever happened to the ‘deformed frogs’ problem? This is a question that we get all the time. I have tried to answer it for Ask NRRI. Deformed frogs continue to be found across Minnesota and around the world, although rarely in huge outbreaks like that discovered in 1995 at Ney Pond in Le Sueur County, and other locations around Minnesota. Research continues to resolve uncertainties in the amphibian malformation phenomena. Sometime between 3 and 6:...
duluthfrogblog.blogspot.com
Duluth Frog Blog: Vernal Pool - Identification and Verification
http://duluthfrogblog.blogspot.com/2014/06/vernal-pool-identification-and.html
Thursday, June 19, 2014. Vernal Pool - Identification and Verification. Vernal pools are small seasonally flooded wetlands that provide vital habitat for many native amphibians and aquatic insects that require fish-free wetlands to survive. (Photos to right show a few examples of vernal pools in northern Minnesota). History, Identification, and Monitoring in the MN Coastal Zone. Raise awareness about the value and importance of vernal pools. Jay Cooke State Park – May 17, 2014 10 am - 1 pm. University of...
duluthfrogblog.blogspot.com
Duluth Frog Blog: Treefrogs in trees
http://duluthfrogblog.blogspot.com/2014/06/treefrogs-in-trees.html
Monday, June 23, 2014. Gray treefrogs ( Hyla versicolor. Are often heard calling from trees near and over wetlands. Recording of the gray treefrog (from the Amphibian Research and Monitoring Initiative). These frogs are often mistaken for birds because of their musical trill and calling location. I recently found one calling from a branch in a small tree near a wetland. Gray treefrog (circled in red) in small tree at edge of wetland. Zoomed in to see gray treefrog sitting on branch. Outdoors with Sam Cook.
duluthfrogblog.blogspot.com
Duluth Frog Blog: Tadpoles and Marsh Marigolds
http://duluthfrogblog.blogspot.com/2012/05/tadpoles-and-marsh-marigolds.html
Wednesday, May 9, 2012. Tadpoles and Marsh Marigolds. Wood frog tadpoles in Duluth are about 10 mm long right now (about the length of my pinkie finger nail). At this size, they are hard to photograph. To put this development into perspective, on this day in 2011 the wood frog eggs had just started to hatch. In many wetlands and ditches, marsh marigolds are blooming,. Marsh marigolds - look for them in your neighborhood wetland or roadside ditch. Wood frogs are still hanging around,.
duluthfrogblog.blogspot.com
Duluth Frog Blog: April 2014
http://duluthfrogblog.blogspot.com/2014_04_01_archive.html
Thursday, April 17, 2014. Citizen Science Frog Monitoring at Hartley Nature Center - April 26. DULUTH, Minn. –. Outdoor enthusiasts of all ages are invited to learn about two research opportunities taking place at Hartley Nature Center, April 26 from 10 am to 1 pm The Saturday workshop will provide information and hands-on activities for frog monitoring and vernal pool identification and assessment. Presentations and guided walks to vernal pools starting at 10 am, 11 am and noon. The Natural Resources Re...
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