Contents tagged with Biology
Created: 4/19/2013 Updated: 8/10/2016
About three years ago, I began a project of trying to take a bunch of butterfly photos. I had an old lecture with images in 35 mm slide format that I wanted to convert to a digital presentation. In the process, I discovered how much more I enjoyed taking digital photos of butterflies than using the old film format. My project quickly changed from getting images for a talk to starting a virtual butterfly collection.
Buckeye (Junonia coenia),
Willow Springs, IL July 18, 2010
This was one of the first specimens in my virtual collection.
I've collected butterflies most of my life. Early on my collecting was simply a hobby. As I began collecting for a variety of professional purposes, I stopped collecting for fun. Among other things, I couldn't justify taking the butterflies simply for my own amusement. Digital photography has changed all of that.
Caption: California Sister (Adelpha californica)
Madera Canyon, Arizona. July 31, 2012
I've been surprised at how similar digital photography is to collecting specimens. Both involve similar pleasures of the pursuit in the field and both require knowledge of habitats and host plants. Both result in a sense of elation at the moment of capture. Both involve work with the specimen once you get it home. In the case of the physical specimen this work involves relaxing, pinning mounting and labeling. In the case of the photograph, it involves cropping and correcting exposure. For me, one of the enjoyable parts of virtual collecting has been keeping records of date and location of capture that are just as rigorous as those that I would maintain for a pinned specimen.
Olympia Marble (Euchloe olympia).
Illinois Beach State Park May 11, 2011
Ethical and conservation concerns aside, there are additional advantages to virtual butterfly collecting over traditional specimen collecting. Want to collect an endangered species or collect in a National Park? Not so fast- you need a slew of permits and a really good reason to do so. But with a camera, you can take as many images as you would like. Are you traveling abroad and want to collect butterflies? Many countries now prohibit the export of species, and many more require a permit. In contrast, the images on your camera will go right through customs, no problem.
Karner Blue (Lyciades melissa samuelis)
Indiana Dunes National Lakeshore, May 30, 2009
A double whammy: This endangered species was virtually collected in a National Park.
One of the things that I always enjoyed with my specimen collection was looking at my specimens much later and remembering where I was, who I was with, and how much I was enjoying myself. I now get a very similar kind of enjoyment from my virtual collection-- and the specimens in it don't fade or break or get eaten by dermestid beetles. I'll continue collecting actual butterflies for the Nature Museum as the specifics of my work require it. But I also expect to be collecting virtually with my camera for my own enjoyment for the rest of my life.
Fatima Peacock (Anartia Fatima)
Vallarta Botanical Gardens, Jalisco, Mexico, February 15, 2012
I had no trouble getting this virtual specimen of a Fatima Peacock through customs when I returned home from Mexico.View Comments
Created: 4/15/2013 Updated: 8/10/2016
One Sunday, the PIP volunteers were doing a program called Meet the Bugs. We brought out a praying mantis, darkling beetles, a wolf spider, and a desert millipede to give visitors a close-up look. The inclusion of the spider and millipede meant “Meet the Invertebrates” would be a more accurate description of the program, but Meet the Bugs is catchier and easier to say.
We also brought out superworms, the legged larvae of darkling beetles (superworms is a misnomer), to provide a before-and-after illustration of insect metamorphosis. The superworms would become beetles, we explained, if they were not eaten by one of the Museum’s turtles first.
Several visitors asked how superworms turned into beetles because they look nothing alike. I compared it to caterpillars turning into butterflies. I hope that was helpful to them, but decided I needed to learn more to provide a better-informed answer next time.
So I googled “darkling beetle metamorphosis” when I got home. There were many results illustrating the pupa stage the beetles go through, comparable to the chrysalis stage for butterflies and the cocoon stage for moths. From viewing the scientific drawings, I realized that I had frequently seen mealworm beetle pupa in the oatmeal-filled drawer where the mealworms are kept without recognizing what they were.
I also found several videos on YouTube of the metamorphosis of darkling beetles. The most interesting was an almost 8-minute video that showed in close-up the larva, pupa, and adult stages of the beetle’s life. My favorite part was watching the legs kicking free of the pupa casing as the adult emerged. The video was a 4th grade class project, part of their habitats unit in science. What a great idea. It gave me a much clearer picture of the process that should help me explain it better to others. Check out the video and see for yourself.View Comments
Created: 4/3/2013 Updated: 8/10/2016
We strive to give our Box Turtles a rich and diverse diet, which provides them with good calcium sources to ensure that they develop strong shells. Of course along with strong shells this also means they grow strong nails.
Normally a turtle would be digging and scratching around outside in dirt and rocks and naturally wear their nails down. We do give our turtles lots of time outside in the summer but at this time of the year they are kept indoors and only get to dig in soft substrate. So what to do with those long nails?
That is where the ‘mani, pedi service’ comes in.
We used Claire for these photos, as she is by far the most calm about having her nails trimmed. We use a standard rotating nail file, which is intended for dogs’ nails.
As with most things involving turtles, this is a two-person job. One person to catch and hold the leg and the other person to file the nails.
I did mention that Claire was the most cooperative of our turtles during this process. She accepts what we are doing and just watches reproachfully.
Pretty Girl and Kennicott show what they think of things by peeing as much as possible! Charlie and Opal will try and sneak a quick bite, if a finger should happen to come within reach. And Manny? Well Manny is like a madman! He has to have a board held between his head and our hands, which he attacks viciously. I wonder do the ladies who work in nail salons usually end up bleeding after giving their customers a manicure? At the end of the process, we clean our various scratches and bites and the turtles have nicely manicured nails.
Created: 4/3/2013 Updated: 8/10/2016
I often get calls from people who have discovered a hawk frequenting their bird feeders. They are usually rather upset and want to know what they can do to make it go away. This can often lead to quite an interesting and thought-provoking discussion.
Firstly, why is it OK to provide all other birds with food except hawks? As with all predators, hawks constantly walk a very fine line between survival and starvation. The Coopers Hawk, which is considered one of the most common urban hawks has been extensively studied, and results show that barely 20% of their hunting attempts are successful. Imagine if only once in every five times you decided to have a meal, you actually got one. You would soon be really hungry! The amount of energy required to take to the wing and actively hunt means that every failed attempt is extremely costly to the hawk. Also, studies have shown that the three most common prey species for urban Coopers Hawks are European Starlings, Rock Pigeons and Mourning Doves. Of those, the starling is an invasive species that is rapidly out-competing and threatening less aggressive native species, the Rock Pigeon is widely despised and considered a messy pest by the vast majority of people and the Mourning Dove is one of the most abundant and widespread birds in North America, producing several broods each year.
The problem, of course, comes from the fact that a lot of people do not want to see an animal killed and eaten by another animal. I used to work in Africa as a safari guide and by far and away the most frequently asked for animals were lions and leopards. Big cats will spend up to 23 hours per day lying around resting and sleeping and trust me, that does not make for very interesting game viewing! But when we happened to come upon these same large predators hunting, many people simply could not bear to watch.
To develop a true understanding of our natural world it is important to recognize that predators have a vital part in every ecosystem whether it be a sunfish devouring a minnow, a Peregrine Falcon grabbing a pigeon on the wing or a lion pulling down an antelope, they are all an important part of a healthy and balanced environment.
So next time you are fortunate enough to see a hawk in your yard, try not to be tempted to chase it away. Watch it, observe it’s behaviour in relation to its surroundings, how does it use its environment to approach its prey? Is it successful? If not, why not? Don’t think of the hawk as evil or nasty, instead consider how privileged you are to be witnessing nature right in your own back yard.
Created: 3/14/2013 Updated: 8/10/2016
In the Public Programs Department we are eagerly awaiting the warmer spring weather to make use of our biggest exhibit- the outdoors! After a frosty winter, it's a relief to hear Red Winged Blackbirds and see sunning Painted Turtles. Program ideas start flowing!
While winter presents its own unique programming opportunities, it's hard not to get excited about the signs of spring and summer. Instead of; “The turtles are hibernating”, or “The monarch butterflies are in Mexico,” we can say, “See all of those turtles on that log,” or “How many monarchs can you find in the prairie?” or “Out the door, let’s explore!”.
This spring and summer there will be so much for visitors to discover in our outdoor exhibits. Outdoor nature walks will touch on themes such as "Nature Noises", "Cloud Gazing" and "Ordinary or Extraordinary?". Other programs like Numbers Through Nature, Spanish Through Nature and Polish through Nature will be taking children outside as well. You can even join us this summer for an outdoor film screening of Willy Wonka and the Chocolate Factory, to celebrate our new exhibit The Birth of Chocolate, or have a drink outside during our program for adults, Nature on Tap.
So take off that winter parka and join me outside this spring and summer to discover bugs, listen to birds and to smell the flowers. Doesn’t that sound delightful?
Laura SalettaView Comments
Public Programs Educator
Created: 3/8/2013 Updated: 8/10/2016
Many of you who visit our Museum on a regular basis will have been lucky enough to meet one of our beautiful Box Turtles when they are out doing critter connections. Maybe Claire or Gorgeous or Charlie or Harrison? As a result you may have been tempted to consider a Box Turtle as a family pet, if you have, please think long and hard before taking that step. Many people do not realize just how much these animals require to live a long and healthy life.
The average lifespan for a Box Turtle is 60 years so you have got to commit to a long-term deal if you are going to own one. Sadly, many people don’t realize this and some of our turtles have rather unhappy stories attached to them. Manny was spotted by a family vacationing in New Mexico, picked up and brought home to Chicago and then after a year they didn’t want him any more. Kennicott was found by one of our Blanding’s Turtle researchers out in a wetland, cold, weak and malnourished. Little Barnaby was left in a pink bucket next to a garbage can in a parking lot.
They were the lucky ones. Manny is staying at the Museum until we relocate him to a nature center in New Mexico, Kennicott has become part of the ‘team’ that does programming at the Museum and Barnaby? Well Barnaby lives with me now. When turtles are not provided with the right environment they will slowly start to shut down. They will refuse to eat, get weaker and dehydrate. We are working with Kennicott and Barnaby to try and kickstart their systems and rehabilitate them. The first task is to get them to start eating and the best way to do this is with a course of vitamin B shots. Firstly we weigh the turtle to establish how much medication to give them.
Barnaby getting weighed.
Kennicott on the scales.
Jamie preparing a Vitamin B shot.
Turtles are not overly keen on receiving injections (who is?) So this is a two-person job. One person holds the turtle and grabs a leg. They have to hold on tight otherwise the turtle will pull into its shell and we are left with nothing to inject into! Then we clean the area of the injection
Before administering the vitamin B into the hind leg
The saline solution helps to combat dehydration. This has to be administered slowly and carefully, not always easy with an angry struggling turtle!
This is done every 24 hours for five days and at the end of this time we hope to have stimulated their appetite sufficiently that they will begin feeding as voraciously as all our other turtles.
Box Turtles are omnivores so they get fed earthworms, crickets, waxworms, mealworms, fish and occasionally as a treat, a pinkie mouse as well as a daily selection of fresh fruit and vegetables. That is another thing to bear in mind before taking on one of these charismatic creatures, there is a lot more involved than just a bowl of lettuce!View Comments
Created: 3/6/2013 Updated: 8/10/2016
Though there is still snow on the ground, spring is in the air. Males of many species are setting up territories so that they can be sure to have resources ready to sow off to the females as they return to their Chicagoland breeding grounds. Birds are particularly obvious because of their loud calls. Listen for the territorial calls of Cardinals in the morning and throughout the day. I think they sound kind of like space phazers when they quickly chirp “cheer-cheer-cheer-cheer-cheer.” Sometimes they will vary this call and say “birdie-birdie-birdie.”
Robins, too, are beginning to sing and they may gather in large numbers to feed on left over fruit still hanging on bushes and trees (I saw 16 in one tree earlier this month.) They are working to build strength for the territorial sing-off that will peak over the next few months. Robins will begin singing before we can even see the light of dawn; in our area, that may be as early as 3am. They are calling to the females who have been flying all night and now need a place to rest, feed, and maybe stay to breed.
Male Mourning Doves aren’t cooing much yet but they are on the lookout for nest sites worth wooing over. Though males and females look about the same, as they begin to pair up, you’ll be able to distinguish the male easily. He’s the one doing all the bowing, cooing, and chest puffing as he tries to show the female that he will be a worthy mate.
Canada geese have already begun pairing up. Although Canada geese are not sexually dimorphic, that is the males and female look the same, it is possible to distinguish both pairs and rivals in the flock. It's very interesting to watch individuals interact with other members of the flock on North Pond this time of year. There is a lot of aggressive beahvior like hissing, head bowing, and mouth open chasing but there is also a lot of pre-breeding activity. You might see a pair of geese taking a walk in the park, away from the flock, or they might just stand around and look at each other near a potential nest site.
As territorial behaviors increase, you may find a birds attacking your car’s mirrors or a window on your house. Birds don’t understand what reflections are so, when they see themselves in your window or mirror, they think it’s an intruder that hasn’t been scared off by their loud singing. So, a battle ensues and the resident bird is unlikely to give up. Just make it so the bird can’t see his reflection--put a piece of paper on the outside of the window, position a lamp so the light overpowers the reflection, put some soap or whitewash over the reflecting area.
Although birds are easy to spot this time of year, if you look carefully, you’ll be able to find salamanders and fish making nests and wooing mates, too. This kind of activity will increase substantially as the weather warms, the days lengthen, and plants begin to actively grow again.
Created: 2/5/2013 Updated: 5/27/2015
Let’s face it, we have had a mild winter so far, but as most Chicagoans know this could change at any time. We could be faced with winter storms, sub-zero temperatures and gale force winds. Those are the days that could force you to stay inside and read a good book. With that in mind, I recently posed a question to the Museum education department – tell me about your favorite book about nature. The responses were varied and interesting we even had a response from outside the education department. I hope you take the time to read some of our recommendations!
Michelle Rabkin, Student Programs Coordinator:
This is my favorite coffee table book, which captivates audiences from 2 to 100 years old. We also use it at the Museum as a resource for programs. This book is visually stunning even if you don’t read a word in it!
Animal, The Definitive Guide to the World's Wildlife
The natural world is a dynamic place and our understanding of it is forever growing and changing. Since Animal was first published in 2001, the African elephant has been reclassified into two species, a cat-sized rat has been discovered in Papua New Guinea, the only plant-eating spider has been found in Central America, a bird-eating fanged frog has been located in Vietnam, and more than 1,250 new species of amphibians have been identified.
Kelly Harland, Museum Educator:
These books are wonderful for elementary aged through adults.
Andrew Henry's Meadow by Doris Burn
In this book you meet Andrew Henry who loves to build things. He builds all sorts of inventions to help his family, but he ends up in the way so he runs to a meadow where he builds himself and his friends houses suited to all their interests. It is a wonderful and creative book about unstructured play and building.View Comments
Owl Moon by Jane Yolen
In this beautifully written story a young girl goes owling with her dad on a quiet snowy evening. The illustrations are beautiful and the readers become caught up in the quiet, stillness of the story.
Two Bad Ants by Chris Van Allsburg
This is the story of two ants who get left behind in a sugar bowl to eat their fill instead of returning with their crystal to the ant hill. They get scooped up in an adventure as a human makes his breakfast. It is a fun ant’s eye view of a kitchen.
Rafael Rosa, Vice President of Education:
A Walk in the Woods by Bill Bryson
The book describes Bill’s effort to walk the Appalachian Trail with a friend. While not specifically about nature, he incorporates quite a bit about the history and natural history of the Appalachian Mountains. His description of the American Chestnut and our loss of the species due to disease has always stuck with me. Humorous and thought-provoking, it is not only one of my favorite books about nature but one of my favorite books in general.
Josie Elbert, Associate Director of Education Programs:
Bees, Snails and Peacock Tails by Betsy Franco
This is a great book to introduce or confirm the terrific patterns and shapes found in nature. I love that the text mirrors the vivid illustrations. I’m inspired when I learn or notice something new from a children’s book! This book did that, and it’s one I’ll add to our family’s collection.
Karen Wilson, Living Invertebrate Specialist:
Honeybee Democracy by Thomas D. Seeley
This book is by a world-renowned animal behaviorist who looks in detail at the amazing process of house hunting and the democratic debate that takes place to make a move. E.O. Wilson sings his praises.
Bugs in the System by May Berenbaum
This is a great read as it looks at insects and their impact on human history from the Silk trade routes, the Napoleonic wars, and current culture. Cool stuff.
Barbara Powell, Associate Director of Education Operations:
The Earth Moved by Amy Stewart
This book goes underground to let us all discover the earthworm and all of its glories. From Charles Darwin’s experiments to a discussion about earthworms as an invasive species, this book is interesting and will tell you all you need to know about our subterranean composters. This book is best for an adult audience but the facts and information discussed would be fascinating for school aged children.
I hope you enjoy these books and look for more recommendations to come!
Associate Director of Education Operations
Created: 1/24/2013 Updated: 8/10/2016
Working with a venomous snake is not for everyone of course but if you are one of the animal care team here at the Museum it is all part of the job. Last week we had the opportunity to take our Horticulturist, Andy and our Invertebrate Specialist, Karen out to Lake Forest to train in the delicate art of working with venomous snakes. Although this is not strictly speaking part of their job it is very useful to have some extra people who are willing to take on this task if needed.
Rob Carmichael who runs the Wildlife Discovery Centre has extensive experience in working with these feisty reptiles and actually trained me and a couple of other staff members several years ago before we got our first Massasauga Rattlesnake.
After a PowerPoint presentation showing the correct way to do things and some rather graphic images of what can happen if you don’t do things right it was time for the ‘fun’ part of the day. Rob has a spectacular selection of snakes with which I could fill this entire blog but I will try and restrain myself to some of the most stunning:
We were here so that Karen and Andy could spend some time working with Massasauga Rattlesnakes. First they learned to move the snake with a snake hook. Once that was mastered, Karen and Andy moved onto the more unwieldy, but more secure snake tongs.
Using the snake hook
Wielding the snake tongs
Practicing "tubing" a snake
Then it was on to learning the art of tubing a snake. This is a skill set that is only rarely needed if the snake needs to have blood drawn, be given an injection or have a stuck lens cap removed and it is not for the faint of heart. Karen and Andy were cool, calm and collected throughout and soon got this new skill mastered.
Finally they learned how to safely bag a snake. This is the task that is easiest to get wrong and when the most bites occur, after all, snake fangs go through a cloth bag very easily! A snake will usually only need to be bagged if it being transported somewhere.
With this final skill under their belts Rob declared that Karen and Andy were now ready to begin working with us caring for our beautiful Massasauga here at the Museum.
Created: 12/27/2012 Updated: 8/10/2016
Of all the species that we work with in the butterfly conservation lab, by far the most challenging has been the species that is also the most seriously endangered, the Swamp Metalmark. This species has proven difficult at virtually every stage of the captive breeding process. The populations where we can obtain founder stock are small. The few females that we are able to collect don’t lay many eggs. We feel very lucky to get more than 90 or so out of a single female. Contrasts that to Regal Fritillary females that can each produce upwards of 800 eggs. Hatching, larval growth and survival to pupation are all modest at best. In northern Illinois, the species has but a single generation per year, which means that we are confronted with the challenge of successfully carrying caterpillars over the winter, a process that has proven difficult for many species. Despite these odds, we continue attempting to breed the species in the lab so that we can return the species to the fens of northeastern Illinois where it formerly flew.
Swamp Metalmark Chrysalis
Swamp Metalmark Caterpillars
Swamp Metalmark adult butterfly
This past August we were able to obtain 4 females from southern Indiana. True to form one of the females died after laying only a single egg. All told, we were were able to harvest about 80 metalmark eggs. Only 63 hatched. We began feeding them leaves of swamp thistle, their preferred host plant The goal is to have adult butterflies next spring that we can release onto a fen in northwest Cook County.
Throughout September and early October we experienced the kind of gradual attrition that is typical of our experience with the species. We were faced with a dilemma: should we try moving the larvae to cages where they would spend the winter outdoors? We have never succeeded with this approach. Or should we raise them through to adulthood and try to get an additional generation with perhaps greater numbers. We have only once before succeeded in rearing the species to adulthood, but did not get any offspring. Despite the uncertainty, the latter course of action seemed less perilous, so we retained the caterpillars in the lab and continued to offer them food.
By mid October we were down to 21 caterpillars. There the numbers stabilized as the caterpillars continued to eat and grow. With few additional losses, we obtained 19 pupae. At the time of this writing we have about 10 adults, four of which are females. We have paired them in small cages where we hope that mating will occur. After a few days we will move the females into egg laying cages and hope for the best.
Although this species is proving difficult to work with, I believe that it is well worth the effort. Swamp metalmarks were once part of the great species diversity that was found in the fens of Illinois. It my firm hope that they will one day fly there again.