Category: Animals

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Oak Tree Rodent Control

Oak Tree Rodent Control
There have been times in Earth’s history when rodents threatened to overrun areas of the planet. Sometimes humans upset the ecological balance leading to an overabundance of rodents. Then people have to find a way to keep them under control. But what if you are an oak tree with a mouse problem? Is there such a thing as oak tree rodent control?

Among other things, rodents eat acorns which are the seeds of oak trees. How can new oak trees be produced if the mice eat the seeds? Dr. Jerry Wolff of Oregon State University made a study of oak trees and white-footed mice in the Appalachian Mountains several years ago. Dr. Wolff found that oak trees in the Appalachian area synchronize their erratic production of acorns. In that way, they control the rodent population.

When the mouse population is low, the oak trees produce a massive number of acorns which swamps the mice with more acorns than they can eat. These well-fed rodents produce high numbers of offspring. Over the next three or four years acorns will be a scarce commodity, and so the rodent population crashes. At that point, the trees again synchronize and switch back to high volume acorn production. There are fewer rodents around to eat them resulting in a greater production of tree seedlings.

Trying to explain this by some chance process stretches credibility. The simpler view is that the DNA of the trees and the mice were designed to continue providing a constant growth of new trees and the production of acorns for the mice. There are many symbiotic relationships in nature where two species are dependent on each other. This oak tree rodent control is a design to guarantee that both species survive. Design indicates a Designer.
–John N. Clayton © 2018
Reference: This study first appeared in Discover magazine in 1992.

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Beware of Praying Mantises

Beware of Praying Mantises
There are organizations that advocate natural control of pests as opposed to the use of chemicals. One effort to control garden pests involves the use of praying mantises. While the concept is good, there are complications. In the natural world with no human intervention, there is a balance between predator and prey. When humans upset that balance, the result is always catastrophic.

In Australia, for example, rabbits were introduced to control certain plants. The rabbits had no natural enemies, and in a very short time, the rabbit population was out of control. Now there is the problem of how to get rid of the rabbits. Here in Michigan, beavers have been brought back into the river where I live. Today they have no enemies, and the beaver population has grown to the point where it is almost impossible to keep decorative trees because the beavers eat them.

The December/January issue of National Wildlife magazine (page 10) brought a new issue to our attention. People have introduced large numbers of praying mantises to control the bugs that were eating their gardens. The problem is that they not only eat bugs, but they will also kill and eat hummingbirds. Some people who have deliberately added numbers of mantises to their property have discovered that they no longer have hummingbirds, and apparently the mantises are the cause.

The Wilson Journal of Ornithology reported a study in which there were 147 cases of praying mantises catching 24 different bird species. The praying mantises capture the hummingbirds at feeders or as the birds are getting nectar from a flower. When we see bad environmental situations in nature, it is almost always due to human mismanagement and not a fault in the design of the system.
–John N. Clayton

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Bird Brainpower

Bird Brainpower
In the February issue of National Geographic, there is a fascinating article about what birds can do. The skills of bird brainpower include puzzle solving, using tools, studying others, vocal learning, socializing, remembering, and social playing.

These abilities are all related to the size of the forebrain compared to the total brain mass. Bird brains vary enormously. Some species such as ravens have very large brains with 80% of the brain involving the forebrain compared to a pigeon having a very small brain with only 48% in the forebrain. In some cases, birds work together pooling their bird brainpower with each having a different role. Some birds prefer certain kinds of music while others seem to show empathy.

It is important to understand that some scientific questions could be raised about the claims that the article makes. In one case, for example, when air was blown on a chick’s fathers, the mother’s heart rate increased. The investigators claimed that shows empathy. A strong wind can be dangerous to any bird. So the question is whether the mother was feeling empathy for the chick or was she concerned over the cause of the wind and what it might do to her.

The article also mentions a cockatoo who rocks in time to the Backstreet Boys tune “Everybody” and a starling who “is happiest when his owner is playing a classical movement on the piano.” The article says the starling likes Mozart, Beethoven, Schubert, and Bach. However, it doesn’t say how you measure starling happiness, or what the owner likes and repeatedly plays in the bird’s presence.

It is a fact that birds show high levels of certain kinds of intelligence, and they can do things that seem almost human-like. However, the things birds can do are not attributes which the Bible ascribes to humans. Many animals are intelligent and can learn from humans, so it is easy to see how the characteristics discussed in the article help the bird survive.

The attributes of being created in the image of God, which is how the Bible defines humans, do not involve any of the characteristics in the article. The creation of art, the creation of music, and the expression of worship are human functions. Also, the expression of the”agape” type of love which does not promote survival or have sexual connotations is a human trait. We don’t see the capacity to be sympathetic and compassionate in these interesting studies of bird brainpower.

The more we learn about the creatures in the world around us, the more we are amazed at the design built into their DNA. This design allows living creatures to navigate, occupy environmental niches, and reproduce in amazing ways. It is all part of knowing that God exists through the things He has made. (Romans 1:18-22)
–John N. Clayton © 2018

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Hummingbird Tongues

Hummingbird Tongues
Outside of my window in the summertime, I have a hummingbird feeder. It is a real distraction because I am just a few feet from birds that flap their wings up to 90 times a second and have a heart rate of 1200 beats per minute. As I watch them stick their beaks into the feeder, I can sometimes see their tongues. I assumed that hummingbird tongues suck up the fluid using capillary action. My friend Richard Hoyt informed me that I was over-simplifying the process and gave me an article to expose my ignorance.

The article tells of the work of Alejandro Rico-Guevara. He realized that capillary action wouldn’t work in sugar solutions above 40%, but some of the liquids consumed by hummingbirds are twice that level of concentration. Rico-Guevara has photographed hummingbird tongues as they get the nectar. Instead of drawing in the liquid, the hummingbird has tubes down the side of the tongue. When it reaches the nectar, the tongue pulls back, and those tubes zip closed carrying the nectar back into the beak.

Ornithologists still don’t understand how swallowing can take place once the nectar is in the beak. Because hummingbird tongues are so efficient, there are many uses of this process in industry. Fluid traps are the newest thing in fluid dynamics, and the Creator already had this complex device built into one of nature’s most amazing creatures. My old idea that the tongue was a capillary tube was much too limited.

To read the article click here.
–John N. Clayton © 2018

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Life Adapts to a Sealed, Poison Cave

Life Adapts
In southeastern Romania in Constanta county near the Black Sea scientists discovered a cave that had been cut off from the outside world throughout history. Yet, even in a sealed, poison cave, life adapts.

Scientists estimate that the cave was sealed off 5.5 million years ago, and its air is low in oxygen (10%) and high in carbon dioxide (3%). That is almost one-third the amount of oxygen and 100 times more carbon dioxide as the air we breathe. The air and water in the cave also contain high levels of hydrogen sulfide and ammonia. The cave is named Movile Cave, and it is full of life. Biologists have identified 48 species, and 33 of them are found nowhere else.

The food chain in the cave is based on chemosynthesis using sulfur instead of photosynthesis which requires sunlight. Bacteria which oxidize sulfur and methane release nutrients used by other bacteria and fungi. They, in turn, create microbial mats on the cave wall. Those mats are grazed by herbivorous creatures which are consumed by carnivorous creatures such as spiders, leeches, and water scorpions. Contrary to what the media has reported, life didn’t start in the cave. Instead, life has adapted to the cave environment.

Scientists have found life around thermal vents deep in the ocean and under the Arctic ice. We find it amazing that life adapts to hostile environments. We also believe this is a demonstration of the wisdom involved in life’s design. And in spite of what the media have reported, this is not necessarily an argument in favor of life under the crust oceans of Europa and Ganymede, the moons of Jupiter.
–John N. Clayton and Roland Earnst © 2018
To find more information click here, and click here.

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Anthropomorphism Extreme

Anthropomorphism
It is very easy to anthropomorphize the behavior of animals. According to Wikipedia anthropomorphism is, “the attribution of human traits, emotions, or intentions to non-human entities…It is considered to be an innate tendency of human psychology.” When your dog cowers after you scold it for doing something, is the dog indicating guilt or remorse? It may look that way, but it may be that the dog has learned that by showing that behavior it will receive less scolding.

There has been an upsurge of scientific material suggesting that humans are not unique in their expressions of grief, guilt, patriotism, devotion, love, hate, etc. Several books have been written promoting the view that no human emotion is missing from members of the animal kingdom. How Animals Grieve by Barbara King and Beyond Words–What Animals Think and Feel by Carl Safina are two examples. There have also been numerous articles in scientific journals promoting anthropomorphism.

The problem is that it is very difficult to avoid anthropomorphism of animals. Frequently we see articles describing how an animal reacts to the death of its offspring. A recent magazine has pictures and discussions of giraffes, whales, dolphins, elephants, gorillas, baboons, chimps, and zebras seeming to grieve at the death of an offspring or a mate for periods of days. (National Wildlife magazine for February-March 2018 page 30-39) The question is whether this is an evolutionary trait of all life and humans are just more highly evolved, or whether we are anthropomorphizing the behavior we see. We have all been influenced by Disney with stories like Bambi, so the question is complicated.

The biblical definition of humans is that we are the life-form created in the image of God. We see that image reflected in the things that humans do that are not physical in nature. We worship. We create art and music and express our emotions in art and music. We feel sympathy and experience guilt. We have an agape type of love that is unrelated to reproduction or survival. We can be taught to think. These properties are made possible by our spiritual nature. We can debate whether all of these characteristics are really unique to humans or whether they have survival value, but our uniqueness as a species is not a function of our intelligence or any physical characteristic.

The difficulty in interpreting animal behavior is that we cannot easily ascertain the role of instinct. Reproduction in animals is instinctively driven. In most mammals the role of the female is determined by her reproductive capacity. It is the lioness that drives the pride, not the male lion. The wonderful work that has been done on gorillas and chimpanzees has shown the role of reproduction in determining the social structure of the entire troop. Study of baboons and chimps shows that stress hormones called glucocorticoids increase when a close relative dies. The release of the hormone oxytocin which inhibits glucocorticoid increases when there is physical contact with other partners after the death of a close relative. What we see in animal behavior is the result of the instinctive drives being disturbed.

There is no question that animals think and that they have emotions, but we should avoid excessive anthropomorphism. Animal emotions are tied into their instinctive drives–not to political or religious values. We suggest that those instincts are part of the design of these animals which provides them with the greatest probability of survival.

The unique nature of all humans should motivate us to value human life. We are not instinctively-driven robots that obey the drives built into our DNA. We can change the world in which we live both physically and spiritually. Valuing all human life and working together to solve the conflicts that divide us is a necessary product of understanding our spiritual uniqueness. When Jesus taught us to love our enemy and to do good to those who do evil to us, He was calling us to express that which makes us human–our spiritual nature created in the image of God.
–John N. Clayton

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Star-nosed Mole: Star of the Mole World

Star-nosed Mole
If you mention the word “mole” in my neighborhood, you will see my neighbors reflect all kinds of negative emotions. This tunneling varmint that tears up the manicured lawns of America is not on the “most loved animal” list of anyone I know. There is a unique member of the mole family that has scientists scratching their heads at the complexity and remarkable design of a mole known as the star-nosed mole. This mole is so unique that it has its own genus identification Condylura.

This six-inch long animal lives in wet lowland areas of the northeastern United States and southeastern Canada. A star-nosed mole possesses 22 fleshy appendages called rays that surround its snout. In addition to using thick claws to dig like all moles, the star-nosed mole can swim which other moles cannot. This species of mole can blow between five and ten air bubbles per second, and these bubbles are aimed at fish or crustaceans. After the bubbles contact a possible target, the moles suck them back into their snouts to test the scent in the bubbles for possible prey. This is the first time scientists have observed a mammal capable of using olfactory skills under water.

The complexity of this animal has caused scientists to call it “a neurological wonder.” The 22 appendages of the snout have 100,000 nerve endings crammed into an area roughly the size of a human fingertip. By comparison, your entire hand contains about 17,000 nerve endings. The rays can touch as many as ten different objects in a single second. The animal can identify individual prey in less than two-tenths of a second and in eight milliseconds determine whether or not it is edible. Researchers say the star-nosed mole eats faster than any other mammal on Earth.

When we find an animal with such highly specialized equipment, we are left with some hard choices in trying to explain its origin. Evolutionary scenarios stretch credibility to the limit. Dr. Ken Catania who has been studying star moles for some 30 years says that the star-nosed mole is a poster child for extreme evolutionary adaptations. We suggest that an intelligence was involved in the creation of this incredible animal. The star-nosed mole speaks loudly to the biblical statement that “we can know there is a God through the things He has made” (Romans 1:20).
–John N. Clayton © 2018
Reference: National Wildlife, February/March 2018.

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Fox Squirrels and My Wife

Fox Squirrels and My Wife
My wife likes to organize things. Items in our pantry are grouped together based on what is in the box or can. All of the spaghetti is stacked together on the same shelf as the spaghetti sauce. All of the soups are together on their own shelf. All the cereal is together on its own shelf. Etc. etc. etc. When I put something in the wrong place, I am chastised, and she expresses amazement at my male inability to understand the importance of organization. I recently learned that fox squirrels do the same thing.

I have often wondered why the large female squirrel I see outside my office window is chattering at the smaller male squirrel who is dashing around seemingly looking for something. It is the dead of winter here, so thoughts of baby squirrels don’t seem to be a reasonable explanation.

A recent experiment done at the University of California-Berkeley may give an answer. Squirrels sort their nuts by a process called “chunking.” Researchers at the university used GPS devices to track 45 male and female fox squirrels for two years. They gave the squirrels different kinds of nuts–almonds, pecans, hazelnuts, and walnuts. The squirrels buried the nuts in unique spots with each nut having its own location.

The researchers made the nuts available one at a time, at different times of the year, and in different locations. The pattern of distribution caused the researchers to conclude that “the squirrels use a surprisingly flexible and sophisticated memorizing strategy to cache their nuts.” I have noticed that our grey squirrels here in Michigan do the same thing. I recently found a cache of sunflower seeds that came from my bird feeders, and later found a cache of acorns. There were no sunflower seeds with the acorns and no acorns with the sunflower seeds.

Fox squirrels gather between 3,000 and 10,000 nuts a year. By using the chunking method, they know where to find each nut type. That simplifies locating food sources. Like my wife, the squirrels know where to find each unique meal item.

We need to re-examine the old idea that squirrels bury nuts at random in scattered places. There is a design feature built into the squirrels’ DNA that assures the squirrel of a more efficient way to find its stored food. Programming requires intelligence, and DNA has to be programmed to work. God has programmed all kinds of instructions into the DNA of His creatures, and this seems to be one more example of how well the process works.
–John N. Clayton © 2018
Reference: The original study was by Dr. Mikel Delgado and was contained in the journal Royal Society Open Science. It was referenced and summarized in National Wildlife, February/March 2018.

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Pterosaur Egg Jackpot Found

Pterosaur
Chinese scientists have discovered a block of sandstone three meters square that has more than 215 fossilized eggs. The eggs are from one species of flying reptiles known as Hamipterus tianshanensis–a pterosaur from the Cretaceous geological period. When scientists find that many eggs in one place, they can establish a great many facts about how the animals reproduced and lived. There is no question about the arrangement of the bones or how they developed.

We have suggested that dinosaurs had a very large role in the development of the resources on Earth that humans would eventually need. Knowing how these animals lived, what they ate, how they got around, and how they interacted with their environment helps us understand that role. In this case, the eggs contain at least 16 embryos for study.

The flying reptiles didn’t have the limitations of restricted mobility that other animals had, so they are of special interest to many paleontologists. Using computerized tomography (CT) scanning, they can see the embryos in three dimensions. Science can tell us much about the history of creation, and the pterosaur is just one part of that picture. We remind ourselves again that can know there is a God by the amazing things He has made.
–John N. Clayton and Roland Earnst © 2018
Reference: Science News, December 23, 2017, page 6.

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Electrogenic Fish

Electrogenic Fish
To keep a balance among living things in the natural world, there have to be many ways for animals to get food. In lakes, oceans, and rivers this is especially difficult because of the amount of cover that exists in which small fish can hide. If small fish over-populate, they exceed their food supply and the whole ecosystem collapses. One way to keep balance is with a predator that is an electrogenic fish.

One of the agents designed into the ecological system is the existence of living things that send out electrical charges. Very little is understood about how this works, but new data is enabling us to understand how cleverly electrogenic fish are designed to enable them to find and eat forage fish.

The January/February 2018 issue of Popular Science (page 75) has an interesting article by Ken Catania, a professor of neurobiology at Vanderbilt University on his studies of electric eels. What he found is that when an electric eel discharges a high-voltage pulse, the nerve fibers in nearby animals are affected. If a small fish is swimming near the eel, it becomes frozen like a statue long enough for the eel to catch it. Even more interesting is the fact that the eel can make any creature that is nearby twitch when the eel fires off a blip of current. The eel can swim up to a clump of seaweed and fire off a pulse. Anything hiding in the seaweed, like a small fish, will reveal its presence by twitching.

Electrogenic fish are just one of many different systems in the ocean that allow predators to keep a balance in the sea. Everywhere we look in the creation we see the wisdom of God revealed “through the things He has made” (Romans 1:19-20).
–John N. Clayton © 2017