A young Barred Owl watches activity below. By Dick Brewer
A: Owl eyes are very large. They are so large that they cannot move in their sockets. Imagine having a pair of binoculars up to your eyes and looking straight ahead. If you hear a sound to the side, you can’t see what made it unless you turn your whole head so the binoculars are pointed toward the sound. That’s how an owl sees all of the time.
Without binoculars, you can roll your eyes up or down and move your eyes left or right without moving your head, but an owl can’t. And even when looking forward, owls have a smaller field of vision than people do.
To see what your visual field looks like try this experiment. Hold your arms out with both of your index fingers in front of your nose. While you stare straight ahead, move your arms in an arc toward your sides, still staring forward. When you can no longer see your fingers
stop moving your arms. The arc that your arms made is your visual field and measures approximately 180 degrees.
An owl’s visual field is only about 110 degrees. For an owl to focus well, it must turn its head to get an object into its visual field. In addition, owls often bob their heads up and down to judge distance.
Below are first hand observations from our volunteer Dick Brewer. He does weekly visits to Bird Rookery Swamp and very week sends us incredible stories of the magical 12 mile loop. If you would like to see more of his observations visit: http://www.dickbrewer.org/CREW.html
By Dick Brewer
“Saturday, February 21st- Fun day for River Otters. One was just past Ida’s pond where I’ve seen it before. It came up on land, rolled in some leaves, and went to the base of a tree. Then, it jumped into ferns at the base of the tree. I didn’t know that otters could jump. It was pulling dead vegetation out and eventually made a small pile of leaves and vegetations and then
marked its territory.
The second group was a family by the dual culverts between markers 6 & 3. There was a large gator dozing by the entrance to one of the culverts and the otters were apparently teaching the young about predators. They were huffing, snorting, and barking and then harassed the gator by dashing at it and in a few cases touching its hindquarters. The gator finally had enough and raised its head, at which time all of the otters dispersed, still very noisy. A couple of bikers came by and were totally entertained.
This plant, with its feathery foliage and towering stature, grows alongside the trail out at the CREW Marsh Trails. The trails get a lot of visitors this time of year, especially 3rd graders from Collier County as part of their field trips to CREW. Schoolchildren visit CREW with their teachers and spend half of their morning on a nature hike, guided by our very own Jessi Drummond, who leads them through stops that feature explanations about prescribed burns, how to identify poison ivy and why it’s an important food source for deer, and even, if they are lucky, investigating scat (most often Bobcat scat). The other half of their field trip is spent dip netting and identifying the different living organisms in their water samples. The kids then have lunch, and leave- hopefully- with a pretty clear idea of why the watershed is important, with discussions that focus on habitat, the water cycle, and how the marshlands help clean our water.
This plant that is pictured above is one of our sensory teaching tools. Jessi stops with the students, takes off a few leaves, and passes them around to the students. “What do you smell?” she asks as little hands eagerly shoot up in the air. The students share that they smell everything from licorice to mint, and Jessi then lets them know that she smells pickles when she smells this plant which is Dog Fennel. Tying in their senses- hearing, touch, smell, sight- is an important part of the field trip for so many kids who just don’t spend enough time outside.
Education is a very important part of our mission at CREW, and this year, we’ve got a fundraising campaign for the month of December. Our goal is to raise $25,000, and an end-of-year gift from you, our supporters and members, can make that happen. It’s part of #GivingTuesday, an effort by many non-profits nationwide to remind everyone that after Black Friday and Cyper Monday, sometimes it’s nice to find a way to give back and pay it forward. Your donation will help further our education efforts at CREW and support all of our educational programs, including our field trips.
You can find out more about our #GivingTuesday campaign on our website (https://crewtrus.mystagingwebsite.com/2014/11/10/6996/). All donors receive a link to a special set of photographs of our CREW wildlife and donors at higher levels can receive special goodies, like tickets to our Concert and Silent Eco-Auction in March.
Next time you are out on the CREW Marsh Trails, watch out for the Dog Fennel, and take a moment to appreciate how this plant on the side of the trail has such a huge impact on 3rd graders in Collier County.
Q: Are African honey bees here? Are they dangerous?
A colony of African honey bees chose to settle on a high tree limb along the Marsh Trail, where they do not pose a threat.
A: According to Dr. Jamie Ellis, entomologist at the University of Florida, approximately eight out of ten wild honey bee colonies in Florida south of a line from Tampa to Daytona are the African honey bees, often referred to as the killer bees.
No honey bees are native to North or South America. European settlers brought a temperate European subspecies with them when they colonized the Western hemisphere, and that species is the common honey bee. The African honey bee was first imported to Brazil in the 1970s by a beekeeper hoping that using a tropical subspecies from Africa would provide more productive honey producers in tropical Brazil.
Escaped queens enabled the subspecies to spread across South America, Central America, and the southern and southwestern United States in just 30 years. It is the most biological successful invasive species.
There are no visual differences between the European and African honey bees. The African honey bee is slightly smaller and has slightly less venom, but the two are so close that the only way to distinguish them individually is to send a sample to the University of Florida’s
lab for dissection.
Both subspecies defend the territory around their colonies, which is the only time the bees will be aggressive as a group. But when a European colony is disturbed, on average only 10-15 bees attack. When an African colony is disturbed, 10,000-12,000 bees attack.
Bees in a colony can detect vibrations in the ground up to 50 feet away from the actual colony, and the African bees can detect vibrations from heavy machinery such as tractors up to 100 feet away. However, colonies located more than 30 feet above the ground do not
usually pose any sort of risk.
When bees attack, it is always to defend the colony. Dr. Ellis said that the ONLY defense is to run away as fast as possible. Once out of the bees’ territory, the attack stops. Several dozen stings will be painful but not lethal.
Running is the only defense, and most people can outrun a bee. Do not stay and swat! The colony is probably close and attacking bees are attracted to movement, so swatting just attracts more bees. Don’t hide in underbrush because the bees can fit in there too, and don’t jump in water. Bees may stay agitated for up to 30 minutes after the colony is
disturbed, which is a lot longer than people can hold their breath under water.
If an attack occurs, survival is the only concern. It takes 5-10 stings per pound of body weight before the attack may be lethal, so barring allergies to bee stings, a 100-pound person could survive up to 1,000 stings.
Seek shelter in a building or vehicle. Some stinging bees may make it in too, but the number will be limited and once they sting, they die. If you see someone else being attacked, yell at them to RUN. If they don’t, do not try a rescue yourself because then there would be two
victims instead of one. Call 911.
As the rainy season picks up and we get rain events bringing 3 or 4 or more inches at a time, the CREW Trails, as you can imagine, begin to get wet. As of this week (July 1, 2014) trail conditions are as follows:
At the CREW Marsh Trails:
Marsh Trail and Alternative Marsh Trail – Some dry spots, but puddles and stretches of several inches of water to a foot deep in places along the marsh edge.
Oak Hammock Trail – One to 4 inches deep in places.
Pine Flatwoods Trail – One to four inches deep in places.
Campsite Gate 3 – needs 4-WD vehicle to access.
At the Cypress Dome Trails:
Green and White Loops – completely under water, depth from one to 6 inches.
Blue shortcut from Yellow to Green Loop – inundated with 3 to 6 inches of water.
Yellow Loop – some dry patches, wet in low areas near seasonal ponds.
All trails mowed on June 26th.
Campsite – dry and accessible.
At Bird Rookery Swamp:
Most of the trail is still dry. A few soft and wetter spots between map points 3 and 6.
Water rising fast.
Grass getting tall.
Of course, how wet the trails are depends on the frequency and amount of rain. A few days without and it’ll dry down. But as the ground gets saturated, even small rain events will fill the low spots with water.
Either way – wet or dry, summer is abuzz with life on the trails. So , come get your feet wet and enjoy the essence of summer in the swamps and marshes of CREW!
This past weekend Boy Scout Troop 11 got a real surprise while hiking the CREW Marsh Trails. Here’s what troop leader Jeff Dodd shared:
My group was out at CREW on Saturday backpacking. We stayed at the gate 3 campsite Saturday night. On the way to camp we were hiking along the Pop Ash Slough Trail and we came across a fawn standing in the trail. As it saw us approach it went into “stealth” mode crouching to get as flat as possible to the ground. Of course this little fella was right in the middle of the trail but I’m sure it thought it was hiding.
CrouchingFawn by JeffDodd
Fawns less than two weeks old usually crouch in place, rather than bolt away. It’s their way of “disappearing in place” because they are not quick enough yet to escape most predators. What a great sighting for this troop of scouts. Thanks to Jeff for sharing the story and the photo with us. And thanks for respecting the fawn and leaving it alone and safe!
If you have CREW wildlife sightings you’d like to share, please let us know so we can post them here for all to see.
Even though I was afraid, I put my big girl pants on and decided that I couldn’t let my children miss this cool opportunity to see this treasure in our SWFL backyard.
… I now have firsthand knowledge of why everyone says that the trails are a MUST-DO during the rainy season. It was a totally different experience…You have to see it to understand it.
Dear CREW,
Thanks so much for asking about our recent trip and wet walk to the Marsh Trails! (Or making sure that we made it out alive….LOL!)
Keri’s kids, brother, and sister-in-law
We had A BLAST!!! I went with my 10 year old daughter, my 8 year old son, and my brother and sister-in-law. I decided to do the wet walk because my niece who is a FGCU student recently did the wet walk with her class and thought it was awesome. We have visited both the Cypress Dome Trails and the Marsh Trails many times in the winter and spring and have had wonderful adventures, but I was assured by my niece that I was missing an amazing and different world out there by only visiting during “dry” season.
Even though I was afraid, I put my big girl pants on and decided that I couldn’t let my children miss this cool opportunity to see this treasure in our SWFL backyard. I was actually going to go to Bass Pro and buy some camo pants to get myself psyched, but I decided my old jean shorts would do. J As we arrived at the wet part near the observation tower, even my brother and sister-in-law – who are very well traveled – asked if I was sure that it was safe to enter the small trail through the grass and swamp water. While the water is semi-clear in most spots, the sea of tall grass looks so ominous! I was thinking “Children of the Corn” only gator style. LOL!
I have to admit that I was very nervous in the water past the observation deck, but my brave little 8 year old son led the way with his big walking stick clearing all the webs made on the morning dew from the friendly spider residents and watching for anything suspect. (He dreams of being a herpetologist or Everglades scientist or guide, so this was right up his alley.) Since this is the end of the wet season, the highest the water ever got was mid-thigh, but that was CHEST high on my son. Was I a coward for allowing my precious boy to lead me on this adventure? Yes! However, I presented it to him that it was his very first guide through the Marsh Trails and he stood tall and felt very important. Most importantly, he did a great job pointing out the flora and fauna!
Among many other creatures, we saw the most beautiful beetle. It was black and had a top so colorful and sparkly that it looked like a Mardi Gras parade participant. The hawks were screeching above our heads and the frogs were singing around our feet. We interrupted at least 4 different black racer snakes sunning themselves on the trails and it was my sister-in-law (not me) who almost stepped on one and screamed so loud that all the vultures in the trees flew for their lives. My daughter and son tried to revive a dying dragonfly and unfortunately were unsuccessful, but it was a good opportunity to discuss the “Circle of Life” and yes I did start singing the song to lessen their pain.
We found many different kinds of scat. Yes, we were excited about finding poop. Who wouldn’t be? Some we assumed was deer due to the plants in it and some we assumed was maybe bobcat. (It had a lot of hair in it 🙂
We also hiked the Popash Trail, which we had never done before, and that was really awesome as well. We really only went that far back into the trails to find the geocaches, but I am so glad that we did because it was just beautiful. Although, it is also a little scary because it is so remote and the trail so narrow. It was thrilling! As our feet left imprints in the jet black mud, we saw so many paw prints of recent animal trails. Of course we thought they were all bear and panther and estimated each animal to be at least 700 pounds in size, but I am sure most were much smaller. We DID however see human foot prints that looked like someone was walking barefooted. It was very strange. So of course that added to the thrill as we and the children concluded that it was either someone with those toe shoes on OR the Skunk Ape. LOL!
Anyway, I now have firsthand knowledge of why everyone says that the trails are a MUST-DO during the rainy season. It was a totally different experience. Especially in the hustle and bustle of our extremely hectic and busy lives, it was as if we stepped out of time into a magical world that only we were a part of. You have to see it to understand it. Every single student in our county should have the opportunity to visit this jewel. Thank you so much for your encouragement and information to make our visit out there a success. If you get reports of a 40-year-old woman running around the trails with her children wildly laughing, don’t worry, it is just the Harty family back for a visit.
~Keri Harty, October 2013
Note: Many FGCU “Environmental Biology of SWFL” and other classes come to CREW for field trips each semester. Kudos to their instructors for exposing them to the wonders of this amazing watershed and teaching about the important ecosystem services it provides to all of us here in SW Florida. And special kudos to Keri’s niece for encouraging Keri to bring her family out for a wet walk to experience CREW in a whole new way!
If you’ve ever walked the CREW hiking trails, you know that sometimes you get to see animals like armadillos and bobcats and black racers – and sometimes you don’t. Yet, you know they are out there – wandering, feeding, sleeping, living their lives. If you’re observant, you can see signs of them everywhere in the form of tracks, scat, nests, and trails.
So, what really walks those hiking trails when we’re not there? Remote cameras are a great way to capture animal activity. One of our CREW volunteers deploys and monitors a remote camera out in CREW. The camera location changes with the seasons, and we often get some great shots of animals rarely seen by people. If you ever wondered what walks the trails when you’re not there, take a look at these shots captured recently…and then make plans to come visit a CREW trail soon.
As the rainy season picks up and we get rain events bringing 3 or 4 or more inches at a time, the CREW Trails, as you can imagine, begin to get wet. As of this week (July 1, 2014) trail conditions are as follows:
