Tag Archive | Wildlife

Snapshot Saturday: March 9th, 2019

White-tailed deer represent nearly 2/3rds of the wildlife captured on Snapshot Wisconsin trail cameras, ones caught with their tongues out represent a disappointingly lower proportion. Happy Snapshot Saturday!

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Interested in hosting your own Snapshot Wisconsin camera? Visit our webpage to find out how to get involved: https://dnr.wi.gov/topic/research/projects/snapshot/.

Snapshot Saturday: March 2nd, 2019

Can you spot the elusive Wisconsin native featured in this Snapshot Saturday? Hint: their winter coats make them experts at camouflage.

3.2.19 SnapshotSaturdayDid you know you can view and classify photos collected from Snapshot Wisconsin cameras across the state at www.SnapshotWisconsin.org? It’s a fun activity for the whole family!

February #SuperSnap

For this month’s #SuperSnap we couldn’t pick just one! Volunteers classifying Snapshot Wisconsin images on Zooniverse may have noticed a boom in bear photos this season, which not only is helping researchers catch up on important bear data – but also bringing an influx of un-bear-ably awesome bear photos!

The American black bear (Ursus americanus) is the only species of bear found in Wisconsin. The current population estimate for the state is around 28,000 bears, whose primary range is restricted to the northern third of the state. These critters previously held the title of “largest resident mammal” until elk were reintroduced, bumping them into second place. Keep an eye for them during Wisconsin’s warm months, before they dip into their winter slumbers.

Continue classifying photos on Zooniverse and hashtagging your favorites for a chance to be featured in the next #SuperSnap blog post. Check out all of the nominations by searching “#SuperSnap” on the Snapshot Wisconsin Talk boards. We can bear-ly wait to see what other neat photos arise!

Snapshot Saturday: February 23rd, 2019

Snapshot Wisconsin cameras capture a variety of animals across the state. From robins soaring through fields in Dane County to moose tromping in northern Wisconsin, what wildlife could you capture on a Snapshot Wisconsin trail camera?

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View and classify photos collected from Snapshot Wisconsin cameras across the state at https://www.SnapshotWisconsin.org.

February Science Update: Fawn to Doe Ratios

One of the major Wildlife Management implications for Snapshot Wisconsin is the project’s contributions toward a system the DNR uses to calculate the size of the white-tail deer population in Wisconsin. Fawn-to-doe ratios, or FDRs, are found by dividing the number of does by the number of fawns seen during the summer months and are summarized by the (82) management units across the state.

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In total, three programs contribute to FDR estimates: Snapshot Wisconsin, Operation Deer Watch, and the Summer Deer Observation Survey.  An advantage of incorporating Snapshot Wisconsin data in these estimates is that Snapshot cameras tend to be placed in secluded, natural areas, whereas the other two collection methods are opportunistic, meaning they’re biased toward counting deer seen near roadways.

One challenge associated with trail camera data is that the same individual animals may walk by the camera multiple times throughout the data collection period. To account for this, we average the total number of does seen in photos with at least one doe, and then average the total number of fawns in each photo containing at least one fawn.  We then take the average number of fawns and divide it by the average number of does.

Fawns and does may or may not be in the same photo to contribute to their respective averages. Defining a single camera-level average for each site drastically reduces the amount of data involved but ensures that the FDR is not skewed toward does, which tend to appear much more frequently on Snapshot cameras.

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2017 and 2018 Snapshot Wisconsin cameras contributing to FDR estimates. Thin grey lines delineate the deer management units, bold black lines define deer management zones.

The above maps show the camera sites that contributed to FDR estimates in 2017 and in 2018. Photos from exclusively July and August were analyzed. A site only contributes to the estimate if there were at least 10 doe observations in one of the two months, but can be counted twice if it had at least 10 doe observations in both months. Statewide, 897 cameras contributed to 2018 FDR estimates, a 44% increase from the 622 sites that contributed in 2017.  Some deer management units decreased in sample size from 2017, but

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2017 and 2018 Snapshot Wisconsin FDR estimates. Thin grey lines delineate the deer management units, bold black lines define deer management zones.

Above are the results of the 2017 and 2018 FDR estimates using Snapshot Wisconsin data. Only deer management units with a minimum of 5 camera sites were included in the analysis. In 2018, the range of FDR was 0.75 – 1.2, which is an overall increase from the range of 0.62 – 1.13 in 2017. Snapshot Wisconsin was launched statewide in August 2018, meaning most cameras in the newly open counties were not deployed until after the data collection period. We expect that the number of cameras in the 2019 analysis will increase again, which would give us even more accurate estimates.

Snapshot Saturday: February 16th, 2019

Check out this red fox captured on a Grant County Snapshot Wisconsin trail camera!

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View and classify photos collected from Snapshot Wisconsin cameras across the state at https://www.SnapshotWisconsin.org.

Snapshot Saturday: February 9th, 2019

We are throwing it back to summer last year for this Snapshot Saturday featuring a bobcat and her three kittens caught on a Vilas County camera. Can you spot them all?

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View and classify photos collected from Snapshot Wisconsin cameras across the state at https://www.SnapshotWisconsin.org.

Snapshot Saturday: February 2nd, 2019

If you don’t look closely, you may easily overlook this white doe captured on a Marathon County Snapshot camera. Happy Snapshot Saturday!

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View and classify photos collected from Snapshot Wisconsin cameras across the state at https://www.SnapshotWisconsin.org.

January #SuperSnap

Emerging from the polar vortex and a foot of snow, we couldn’t help but reminisce on summer days for January’s #SnapshotSaturday! This summertime buck from Iowa County was nominated by Zooniverse volunteer TJPer.

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Continue classifying photos on Zooniverse and hashtagging your favorites for a chance to be featured in the next #SuperSnap blog post. Check out all of the nominations by searching “#SuperSnap” on the Snapshot Wisconsin Talk boards.

Snapshot Saturday: January 26th, 2019

Whether you’re enjoying ice fishing or a fisher enjoying the ice, happy Snapshot Saturday!

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Interested in hosting your own Snapshot Wisconsin camera? Visit our webpage to find out how to get involved: https://dnr.wi.gov/topic/research/projects/snapshot/.