Florida has a love-hate relationship with this animal. Some find them cute and adorable, others find them a pest and a nuisance, either way there is no ignoring this guy. They are everywhere and yes – they can make a mess of your lawn and garden. So, for those who are not so in love with the creature – what can be done?
Let’s first meet the animal.
There are about 20 species of armadillo found in Central and South America but there is only one in the U.S., the Nine-Banded Armadillo (Dasypus novemcinctus). The Nine-Banded Armadillo is originally from South America and there were several different species of armadillos that made the trek from South to North America prior to the ice age. But after the ice age it seemed no armadillos were present in the U.S. After the ice age, the Nine-Banded Armadillo expanded north into Mexico, but it seems could not cross the Rio Grande. That is until Americans began to settle the area. Prior to American settlement, armadillos were hunted for food, and the land on both sides of the river was regularly burned. The American settlers ceased the burning and the Native Americans declined in numbers, so hunting pressure declined as well. Many armadillos were probably brought across intentionally, but others who managed to swim across, and armadillos can swim, now found suitable habitat with the decreased burning. They had arrived and began expanding both east and west across the southern U.S. However, the Mississippi River presented another barrier they could not deal with.
The common nine banded armadillo scurrying across the lawn.
Photo: Les Harrison
The introduction in Florida was a different story. Apparently in the 1920s and 30s they were released by humans. One release appeared to be an escape from a small zoo. Another was from a circus. There are reports of armadillos riding cattle cars on trains from the west and this allowed them to cross the Mississippi. In the 1920s bridges were built across the river for a new invention called the automobile. All of this led to the invasion and the animals are now here, they are also expanding north.
Armadillos like warm/wet climates. They prefer forested areas or grasslands and, again, can swim small rivers and creeks easily. It has been reported they can hold their breath up to six minutes and have been seen literally walking along creek bottoms.
They feed primarily on a variety of small invertebrates such as grubs, snails, beetles, and even cockroaches (many of you will like that). They like to feed in wet areas or loose sandy soils where digging is easier. Unfortunately, your lawn is a good place to hunt. They rarely, but do, feed on small reptiles and amphibians and eggs.
They breed in the summer but delay egg implantation so that birth is in the spring. They typically give birth to quadruplets. The armor of the young is not hard at first but hardens over time and does provide protection from large predators like panthers, bears, and alligators. They typically live 12-15 years, but some have reached the age of 20.
So… now you know the animal… for those who do not want them, what can be done?
Based on an article from UF IFAS Extension, not a lot. Typical methods of deterring wildlife have not worked. Poisons, smells, and even using firearms has not relieved the homeowner of the problem. One study looked at trapping and found that in general it is hard to get them to enter. In this study they caught one armadillo every 132 trap nights – low percentages. Another study looked at baits and found crickets and worms worked best, but the smell of other armadillos in the trap also lured them. One colleague mentioned the need for solid wood traps and he baits them with nothing but the shells of roadkill as had good success. He mentioned the designs of these wooden traps are online. You can get plans to build them, and you can also purchase pre-made ones. Once captured they can be relocated but the trapper should be aware that armadillos have many peg-like teeth and very sharp claws for digging. HANDLE WITH CARE. It is also known that armadillos can carry leprosy, though cases of leprosy being transmitted to humans are rare. None the less, handle with care.
For more information on this animal, contact your county extension office.
Since 2005 we have been tracking and monitoring diamondback terrapins in the Florida panhandle. For those of you who are not familiar with the animal, it is a turtle in the family Emydidae. Emydid turtles include what we call “pond turtles” and also include the box turtles. Terrapins differ from the others in that (a) their skin is much lighter, almost white, and (b) they like salt water – more accurately, they like brackish water.
Diamondback terrapin (photo: Molly O’Connor)
The animals range from Massachusetts to Texas and within this there are seven subspecies. Five of these live in Florida, and three only live in Florida. In the Florida panhandle we have two subspecies: the Ornate terrapin (Malaclemys terrapin macrospilota) and the Mississippi terrapin (M.t. pileata). It is believed the that the Mississippi terrapin only exist in Florida within Pensacola Bay – more on that in a moment.
Image provided by FWC
There are literally no peer reviewed publications on terrapins from the Florida panhandle… none. And this was how the Panhandle Terrapin Project began. The first objective for the project was to determine if terrapins even existed here. We began surveying for evidence of terrapins in 2005 using students from Washington High School in Pensacola. The project quickly fell to myself and my wife due to the best time to do terrapin surveys was May and June. And the worst time to work with high school students was May and June. Between 2005 and 2012 we were able to verify at least one terrapin record in each of the panhandle counties. Yes… terrapins exist in the Florida panhandle.
The second objective was to assess their population status. To do this we used what I call the Mann-Method. Tom Mann, Mississippi Department of Wildlife, had developed a method of using nesting surveys to estimate relative abundance of terrapins within a population. Terrapins tend to have strong site fidelity – they are “home bodies” – and do not move from marsh to marsh. If you can find their marsh, you can find their nesting beaches. If you can find their nesting beaches you can use the Mann-Method to assess their relative abundance.
Tracks of a diamondback terrapin.
Photo: Terry Taylor
There are a couple of assumptions with the Mann-Method. (1) You are assuming every female in the population nest every year – we are not sure that is true. (2) You are assuming that each female will lay more than one clutch of eggs each season – we do believe this is true. (3) You are assuming that each female will not lay more than one clutch in a 16-day period – we are not sure this is true. (4) You know where all of the nesting beaches are – we are not sure we do. (5) The sex ratio of male to female is 1:1 – we are sure that is not the case. One study suggested that in the panhandle the ratio may be 1:3 in favor of males, another suggested 1:5 in favor of males.
Based off this model, and its assumptions, during a 16-day period of the nesting season, each track/nest would be an individual female. Using 1:1, 1:3, and 1:5 as your sex ratio you can get an estimate of relative abundance.
Another method for estimating relative abundance is counting the number of heads in a 30-minute period. It is understood that if I see different heads during periods of the survey, I may be seeing the same head, but the argument is that if I typically see 10-15 heads during a 30-minute and over time that becomes 15-20, or 20-25, the relative abundance of terrapins is increasing – and visa versa.
A terrapin swimming near but not entering a modified crab trap.
Photo: Molly O’Connor
And we now have a third and fourth objective. A third objective is to capture animals to place tags on them. Doing this can give us a better idea of how these terrapins are using the habitats in the panhandle, how far they may travel and how they are getting there. The fourth objective is to obtain tissue samples for genetic analysis. The purpose of this is to determine whether the populations in Pensacola Bay are Mississippi terrapins, Ornate terrapins, or hybrids of the two.
Since 2015 this work is now being conducted by trained volunteer citizen scientists – people like you – and we do the trainings in March if interested.
So… how did things go in 2022?
In 2022 we trained 47 volunteers to be survey beaches. 25 (53%) participated in at least one survey.
173 surveys were conducted between April 2 and July 31 at 14 nesting beaches between Escambia and Bay counties. Encounters with terrapins, or terrapin sign, occurred during 43 of the 173 surveys (25%) and three terrapins were captured for tissue and tagging.
Escambia County
Number of Surveys
Dates
Number of Surveys / Day
29
Apr 3 – Jul 31
0.2
Number of Encounters
Frequency of Encounters
Heads / 30-minutes
Estimated Relative Abundance
4
.18
No surveys conducted
4-12
Santa Rosa County
Number of Surveys
Dates
Number of Surveys / Day
58
Apr 4 – Jul 5
0.6
Number of Encounters
Frequency of Encounters
Heads / 30-minutes
Estimated Relative Abundance
15
.26
N=2, 0-49, X = 24
30-90
Okaloosa County
Number of Surveys
Dates
Number of Surveys / Day
43
Apr 18 – Jul 15
0.5
Number of Encounters
Frequency of Encounters
Heads / 30-minutes
Estimated Relative Abundance
25
.58
N=17, 0-32, X = 11
30-90
No surveys were conducted in Walton County
Bay County
Number of Surveys
Dates
Number of Surveys / Day
43
Apr 2 – Jun 30
0.5
Number of Encounters
Frequency of Encounters
Heads / 30-minutes
Estimated Relative Abundance
0
.00
No surveys conducted
0
Summary of 2022 Terrapin Season
Surveys of nesting beaches occurred in four of the five counties in the western panhandle.
Terrapins were encountered in each of these cand captured in two of them.
The relative abundance ranged between 0 (Bay County) to between 30-90 individuals (Santa Rosa and Okaloosa counties) and was about 64-192 animals for the entire western panhandle (depending on the sex ratio you use).
We are sure that we have not found all of the nesting beaches in this region and will continue to look for more.
We are awaiting results from the tissue sampling to determine whether we have a distinct population of Mississippi terrapins in Pensacola Bay, but more samples will be needed.
We need to place satellite tags on some females to get a better idea of how they travel through the system.
And our relative abundance numbers suggest that populations in the Florida panhandle are relatively small compared to others within the terrapin range.
More needs to be done and we will continue to survey each spring. If you are interested in becoming a member of the Panhandle Terrapin Project, contact me (Rick O’Connor) at roc1@ufl.edu.
In the southeast it marks the beginning of Fall. The American Robin (Turdus migratorius) is found throughout North America. They spend their spring and summer months in the northern states but as the winter temperatures approach, they migrate to the southern gulf states. This allows them to escape the summer heat which is extremely stressful to them.
The American Robin.
Photo: Kalyn Waters
Robins migrate due to the freezing temperatures which harden the ground making it difficult for them to access their main food source, the earthworm. As they migrate, they travel at about 30 to 36 m.p.h. covering anywhere from 100 to 200 miles per day. To navigate their way during migration robins use the angle of the sun in relations to the time of day, this is why they travel during the day.
While robins are excellent migrators, only about 25% of all fledglings will survive the migration, and several adults will fall victim as well.
The head and tail feathers of the male robin are very dark with brighter orange when compared to the females. In the spring the males will migrate back to cooler climates before the females. This has to due with the roles they play in raising their young. The male’s job is to find the best territory and defend it. While the females build the nest, lay, and incubate the eggs. The female has no rush to return so she will wait until the thaw has come. If she returns to early to start building, a frost can damage the strength of her nest, which is built from mud.
While robins typically nest in the exact same location every spring in the north, they typically wander in the winter months to different locations from year to year. As our fall temperatures continue to bring a chill, be on the look out for the American Robins as we welcome them to the south this fall. And while they are likely not the same birds we had last fall, they have made their 1000 + mile journey to enjoy our mild winter.
A buck chases a doe through plots of wildlife forages being evaluated at the University of Florida’s North Florida Research and Education Center. Photo Courtesy of Holly Ober
When I sat down to start writing this article, I was thinking it would be a rewrite of an article I posted back in 2016, Don’t Rush Wildlife Plantings – Wait for the Rain. The prolonged period of dry weather which the Panhandle has been experiencing and the time of year made the topic appropriate. However, I am happy to report that it has rained almost two inches at my house in Chipley in the past 24 hours. This changes things a bit – at least for those of us who were fortunate enough to have received rain. For those who did not get rain, see the aforementioned article. If you did get rain, it’s time to start getting some seed in the ground.
All that said, instead of just focusing on dry conditions I am going to share some highlights from recent conversations I’ve had regarding the establishment of cool-season food plots. For the sake of brevity, I may not elaborate fully on each point, feel free to call of email me if you have any questions or would like to discuss further.
Check your pH. Collect a good representative sample from each of your food plots and have it analyzed by a reputable lab. Contact you County Extension Office for help with this. Food plots are notorious for being planted on marginal sites (not good farmland) where the pH needs to be modified. Poor pH will inhibit plant performance and reduce plant response to really expensive fertilizer applications. In general, food plots perform the best with a pH of 6 – 6.5.
You’re gonna have to make those really expensive fertilizer applications if you want to see real plant performance. See the comment above about marginal sites. Even good soils require fertilizer to make a good crop. A lab analysis is the only way to know exactly what you need. Just for the sake of reference, applications of 300lbs of 13-13-13 per acre as soon as the plants are up good is a pretty standard starting point and generally multiple applications are needed during the season.
Deer like broadleaf plants considerably more than they like grasses. Cool-season grasses (oat, wheat, triticale, cereal rye) are relatively inexpensive and easy to grow. Deer will utilize them some and game birds will feed on seed heads in the spring.
Brassicas (Kale, Rape, Radish, Turnip, Swede) are broad-leafed and grow very quickly on a wide variety of soil types. Unfortunately, deer preference for them is somewhat hit-or-miss and they are not readily utilized by other game species.
Cool-Season legumes (clover, winter peas, vetch) are generally what deer show the greatest preference for and, when properly inoculated, do not require any nitrogen fertilizer. Cool-season legumes are somewhat finicky about what soil types they will perform well on. They all like moderately well drained heavier soils with some clay content (good upland farm ground) and they all struggle in deep, excessively drained sands. For sites on the wetter side (more poorly drained) look at white clovers. For sites on the drier side (well to excessively drained) look at the vetch, peas, and maybe crimson clover.
In general, seed size dictates optimum planting depth. Large seeds (grasses, vetch, peas) can be planted deeper (1-2 inches). Small seeds (clover) need to be planted very shallow (0-0.5 inches). This variation in planting depth likely will necessitate separate techniques for large and small seeds as small seeds planted too deeply will fail to emerge. Small seeds, like clover, need to be planted into a firm seed bed. To achieve a firm seed bed, prepare soil and wait for the tilled soil to settle and preferably become rain packed. If waiting is not an option soil should be firmed with a cultipacker or roller.
Much more information on cool-season planting options is available in the document:
Over the last few weeks, I have received several questions and comments on, and about, the eastern indigo snake. I was curious as to why so many in such a short time – maybe a public television program on them or something? Not sure, but it is an amazing snake and I like to talk about them. So, let’s talk about them.
The eastern indigo (Drymarchon couperi) is the longest native snake found in North America. It reaches a length of 9 feet and can weigh up to 11 pounds. It is beautiful. A shiny, iridescent black, with smooth scales that give a glossy look and emits beautiful patterns of color when the sun reflects off it that resembles the sheen you see when gasoline is spilled on water. This beautiful coloration, being nonvenomous, and docile attitude made it very popular as a pet – except that it can reach up to 9 feet long.
The eastern indigo snake.
Photo: Molly O’Connor
Their habitat of choice are high sandy ridges along the extreme southeastern United States. These ridges are covered with longleaf pine or turkey oak trees and provide enough space, hibernacula, and food to support them. Though a point of origin has not been published, the historic range suggest a possible origin in Florida. It has been suggested that there were once two distinct genetic forms of indigo snakes, one existing along the Gulf coast and another along the Atlantic coast. It appears there was a climatic barrier separating the two which no longer exist and today it is believed that there is only one species in existence now. The historic range of the snake included extreme southwest Mississippi, extreme coastal Alabama, extreme coastal Georgia, and all of Florida. The most recent range shows the snake exists across the entire Florida peninsula and some portions of southern Georgia but does not include all of Georgia’s historic range. It may be extirpated in the Florida panhandle, with a few rare reports, and believed to be completely extirpated in southern Alabama and Mississippi.
Indigos live mainly solitary lives with large home ranges that can extend hundreds to thousands of acres. Males have larger home ranges than females. Indigo snakes are diurnal and forage for their food rather than sit and ambush as many snakes do. Their diet consists of a variety of species, but diet studies show that rodents, frogs, small turtles, and snakes make up the bulk of their prey. It also includes species of venomous snakes like the eastern diamondback and copperhead.
Indigo snakes move between upland and lowland habitats during the warmer months. During the winter months they are closely associated with gopher tortoise burrows where the temperature can range between 45F and 88F and average 54F. They often emerge on sunny winter days to bask but do not move too far from the burrow. It is not known how long indigos live in the wild, but they have lived as long as 25 years in captivity.
During the 20th century the population of these snakes began to decrease. As is often the case, the loss of suitable habitat was a big problem. Longleaf pine forests where no prescribed burning was occurring as frequently as they had historically, the understory altered the habitat to a point where indigos could not support themselves. This also led to the decrease in gopher tortoise populations along with their burrows in which the indigos needed. The harvest of gopher tortoises as food and pets also decreased the number of burrows and thus the number of snakes. Often people would pour gasoline into the burrows to get the tortoises out and this led to the death of many indigos. And then there was the collection of the snakes for the pet trade. Another problem was that they are snakes. An eight-foot snake crawling around had little chance of escaping the wrath of scared humans.
The eastern indigo snake is the largest nonvenomous snake in the southeast.
Photo: Molly O’Connor
Today they are completely missing in Mississippi, Alabama, and the Florida panhandle. They are listed as an endangered species under the Endangered Species Act, and there are attempts to restore their populations in Alabama and the eastern Florida panhandle. Though there are occasional reports from the panhandle, there have been no verified records of the eastern indigo in the western panhandle since 1999. We would like to see this animal return but to do so, the habitat will need to be restored, and head starting (releasing captive bred snakes) may be needed as well. Though they are large, they are harmless to humans and actually provide a needed service by controlling the populations of venomous snakes in our region. I for one would love to see them return.
October has been designated as Coastal Dune Lake Appreciation month by Walton County government. Walton County is home to 15 named coastal dune lakes along 26 miles of coastline. These lakes are a unique geographical feature and are only found in a few places in the world including Madagascar, Australia, New Zealand, Oregon, and here in Walton County.
A coastal dune lake is defined as a shallow, irregularly shaped or elliptic depressions occurring in coastal communities that share an intermittent connection with the Gulf of Mexico through which freshwater and saltwater is exchanged. They are generally permanent water bodies, although water levels may fluctuate substantially. Typically identified as lentic water bodies without significant surface inflows or outflows, the water in a dune lake is largely derived from lateral ground water seepage through the surrounding well-drained coastal sands. Storms occasionally provide large inputs of salt water and salinities vary dramatically over the long term.
Our coastal dune lakes are even more unique because they share an intermittent connection with the Gulf of Mexico, referred to as an “outfall”, which aides in natural flood control allowing the lake water to pour into the Gulf as needed. The lake water is fed by streams, groundwater seepage, rain, and storm surge. Each individual lake’s outfall and chemistry is different. Water conditions between lakes can vary greatly, from completely fresh to significantly saline.
A variety of different plant and animal species can be found among the lakes. Both freshwater and saltwater species can exist in this unique habitat. Some of the plant species include: rushes (Juncus spp.), sedges (Cyperus spp.), marshpennywort (Hydrocotyleumbellata), cattails (Typha spp.), sawgrass (Cladiumjamaicense), waterlilies (Nymphaea spp.), watershield (Braseniaschreberi), royal fern (Osmundaregalis var. spectabilis), rosy camphorweed (Pluchea spp.), marshelder (Ivafrutescens), groundsel tree (Baccharishalimifolia), and black willow (Salixnigra).
Some of the animal species that can be found include: western mosquitofish (Gambusiaaffinis), sailfin molly (Poecilialatipinna), American alligator (Alligatormississippiensis), eastern mud turtle (Kinosternonsubrubrum), saltmarsh snake (Nerodiaclarkii ssp.), little blue heron (Egrettacaerulea), American coot (Fulicaamericana), and North American river otter (Lutracanadensis). Many marine species co-exist with freshwater species due to the change in salinity within the column of water.
The University of Florida/IFAS Extension faculty are reintroducing their acclaimed “Panhandle Outdoors LIVE!” series. Come celebrate Coastal Dune Lake Appreciation month as our team provides a guided walking tour of the nature trail surrounding Western Lake in Grayton Beach State Park. Join local County Extension Agents to learn more about our globally rare coastal dune lakes, their history, surrounding ecosystems, and local protections. Walk the nature trail through coastal habitats including maritime hammocks, coastal scrub, salt marsh wetlands, and coastal forest. A tour is available October 19th.
The tour is $10.00 (plus tax) and you can register on Eventbrite (see link below). Admission into the park is an additional $5.00 per vehicle, so carpooling is encouraged. We will meet at the beach pavilion (restroom facilities available) at 8:45 am with a lecture and tour start time of 9:00 am sharp. The nature trail is approximately one mile long, through some sandy dunes (can be challenging to walk in), on hard-packed trails, and sometimes soggy forests. Wear appropriate footwear and bring water. Hat, sunscreen, camera, binoculars are optional. Tour is approximately 2 hours. Tour may be cancelled in the event of bad weather.
Our coastal dune lakes are even more unique because they share an intermittent connection with the Gulf of Mexico, referred to as an “outfall”, which aides in natural flood control allowing the lake water to pour into the Gulf as needed. The lake water is fed by streams, groundwater seepage, rain, and storm surge. Each individual lake’s outfall and chemistry is different. Water conditions between lakes can vary greatly, from completely fresh to significantly saline.
