Jan. 06, 2025
Camels do not have hooves! They are not like horses, or even goats, cattle, giraffe, etc. Camels have soft, padded feet with toenails. In many ways, they are very similar to our own feet, or a dog's feet with the obvious exception of having only two toes on each foot. The pad of the camel's foot is specialized, and spreads out when the camel's body weight bares down on it, keeping the camel from sinking in sand, similar to a snow shoe.
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Camels are herbivores. They are browsers, which means that they not only eat grasses on the ground like horses and cattle, but they also reach up into bushes and trees for leaves as well.
On our farm, our camels eat a variety of hay, including alfalfa and bermuda grass hay, while they also roam our pastures eating the natural grasses and bushes. In addition, we offer our camels tree branches and bush branches like acacia, California pepper, palm branches, mustard plants, tumbleweeds, and dandelion greens.
Occasional grain, especially offered to a mother nursing her calf or a camel who is exercising a lot (like one of our geldings who gives camel rides to guests), is a welcome supplement. However, too much grain is not not needed, and not particularly good for camels.
It is also important to provide camels with salt and other essential minerals.
Camels are less about speed and more about endurance. That being said, a racing camel in Saudi Arabia regularly achieves speeds of up to 40 miles per hour.
At those speeds, they are galloping like horses do. But camels prefer a slower pace. They do not trot like horses. Their equivalent gait is called a pace. In the pace, both right legs move together, while alternately both left legs move together. This creates the rocking or swaying motion that earned the camel it's nickname, "ship of the desert".
Yes, yes, a thousand times yes! They are highly intelligent and communicative animals. They have a very involved social hierarchy that utilizes vocalizations and body language to communicate.
When teaching camels, they soak up information like giant sponges. It is common to finish a teaching session in the afternoon only to see the next day that your camel has not only retained what you taught them, but has thought about it and is further along then where you left off.
Because camels are so intelligent and communication is vital to them, it is extremely important that they are given good guidance, stimulation, and teaching at the correct ages. We also find that the camels raised by camels rather than by humans have better social skills and are more emotionally balanced.
If given the opportunity, a camel will drink water every day. At the Oasis Camel Dairy, our camels have access to water at all times. We also ensure that they are given water at regular intervals, especially when they've been working with guests.
Camels love water. They especially like slurping it out of a hose, off of the ground, or off the edges of their barn roofs. However, camels are adapted to live deep in the desert, where finding food can take them far, far away from water sources. Camels easily go two weeks without a drop of water to drink in the harshest of desert environments. And not only do they survive... they thrive.
A camel can travel at a steady pace for over ten hours a day carrying loads up to six hundred pounds, or nurse their calves while trekking for weeks without water. Surprisingly, the secret to the camel's ability to go without water does not lie in their hump. It lies in their blood.
Most mammals have round red blood cells. Camels have elliptical shaped red blood cells. This elliptical shape withstands the higher osmotic pressure that water-depleted blood places on the red blood cells. Camels can loose up to 25% of their body weight in water without experiencing deadly side effects. Isn't that amazing?
Ok... we had to! Believe it or not, we do not get tired of being asked what day it is, or hearing someone walk up to the camels saying, "Mike, Mike, Mike, Mike, Mike".
From the first airing of GEICO's famous commercial featuring the happier than a camel on hump day start, America began to see camels in a very different light. As silly as the scenario seems on film, the commercial does a great job at capturing the playful, easygoing, digs-their-job, digs-their-coworkers way camels really are.
So yes, we are thrilled when asked... "Hey.. what day is it?"
Why? Well, it really took a lot of heat off of the one question we are asked the most, which is...
No, our camels do not spit.
Camels can spit. However, our twenty-plus years working with camels has taught us that happy camels do not spit. In fact, even if we have to do something our camels do not enjoy, like giving them a shot or even an oral examination, they will tell us about it, but they do not spit on us.
So when does a camel spit? A camel can learn to spit as a way to get out of doing something they do not want to do. A camel may spit because they are anticipating an unpleasant experience that they do not understand.
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Working with camels is like good parenting. You are loving, but you are in charge. You are the boss, but you are a boss that listens. When camels feel safe and secure; when they enjoy the company of humans and their camel pasture mates, then there is no reason to escalate to the dramatic display of spitting.
Camels (Camelus dromedarius) are a hallmark of the Arabian Desert. There have been numerous studies on camels, including those on adaptations, physiology, anatomy, immunology, morphology, nutrition, and several other aspects related to camel health and utility for humans (Gebreyohanes and Assen, ; Root-Bernstein and Svenning, ; Vyas et al., ; Yam and Khomeiri, ). In contrast, there has been a remarkable paucity of research on the natural, wild behavior of camels (Lethbridge et al., ). Even though camels are known as desert ships, their navigational abilities have not yet been studied. A camel owner told me, I had camels transferred from my farm near Omani borders to an island off Abu Dhabi. Few days later, the camels went missing and were later found in the old farm. They swam and travelled all the way to get there. Despite the anecdotes on the amazing ability of camels to cross vast stretches of deserts, the scientific literature is void of detailed studies on how the camels accomplish these tasks.
Over more than half a century, various taxonomies of navigational strategies have been proposed ranging from homing by beacons, to performing path integration, and finally to using cognitive maps. These strategies have been investigated in many groups of animals, particularly in arthropods, turtles, birds, and mammals (Alyan and Jander, ; Fuxiage et al., , Gallistel, ; Able, ; Trullier et al., ; Benhamou, ; Wiener et al., ; Wiltschko and Wiltschko, ; Åkesson et al., ; Warren, ; Wehner, ). However, none of these navigational strategies have been examined in camels.
In this respect, the paucity of detailed studies applies to other large terrestrial mammals as well. Some studies deal with the behavior of animals along migration routes, e.g. studies performed in polar bears (Rogers, ), caribous, wapitis, and mule deer (Ramsay and Andriashek, ; Craighead and Craighead, ; Morgantini and Hudson, ; Thomas and Irby, ), while in others round-trip excursion routes have been recorded, e.g. in polar bears (Rogers, a), or homing successes of displaced individuals have been determined, e.g. in black bears (Rogers, ). In general, experimental translocations of some species of large mammals revealed that carnivores are more likely to home successfully than herbivores (Rogers, , ). According to a recent study, elephants seem to use habitual routes when travelling in the less familiar periphery of their home range area, while resorting to a cognitive map when moving within the core area (Presotto et al., ). The use of Euclidian cognitive maps has especially been proposed in wild chimpanzees (Boesch and Boesch, ).
In the current study, displacement experiments are used to examine how female camels navigate over short distances (less than 10km), whether they can do so by path integration, and whether there are differences between nursing and non-nursing females.
Several experiments were conducted to investigate the homing behavior of camels. Naïve camels were taken from their living pens to a new location that was 56km away. Camels were taken to the release location on foot or were transported in a truck. The results can be summarized as follows. First, freely ranging domestic camels raised on farms learn to go back to their home after spending time foraging away from it. Second, camels that were displaced to a non-familiar location 6km away from home, returned, regardless of whether this displacement was active (guided on foot) or passive (transported in a truck). In the latter case, their homing performance was not affected when their sight, smell and hearing were impaired on the way out, the homing trip was performed during daytime or nighttime or by suckling status. However, efficiency was impaired when camels were subjected to disorientation during outward passive transport. So, camels seemed to rely on path integration to infer the general direction of home. However, visual or other guiding cues were employed at different instances while proceeding towards home.
The main question of this study was to determine how camels find their way back home after being displaced by few kilometers. Three mechanisms could be used to achieve this task: guided orientation, orientation by path integration and orientation by learned landmark constellations (Åkesson et al., ). The camels that we used were unfamiliar with the release area, and the release point was separated from the homing pens by high sand dunes. This minimized the reliance on visual guiding cues or visual landmarks to find their way home. Additional support for this is that releases were made during daytime and nighttime, and the camels homed well under both conditions. However, this method did not preclude the use of olfactory, auditory, or other cues to find home. These cues could be used as guidance or as the basis for a cognitive mapping system. Despite these limitations, the findings increased the probability that the camels relied on path integration to find their way back home. The guiding cues and landmark orientation strategies were further weakened as possibilities because camels were masked during passive transport to the release area. Thus, gathering any such information about their surroundings would have been impossible without normal function of essential sense modalities during transport. The disorientation experiment further confirmed that the camels relied mainly on a path integration strategy to find their home. Camels that were transported in trucks and taken along a looping winding path were unable to find their home; they had to be picked up from their last stop and returned to the homing quarters by truck. These same camels homed well when they were carried in a truck to the release site in a simple, straight outbound path. Conversely, camels that previously homed after a straight displacement could not find their way home after a convoluted transport. It is important to mention here that the camels that were subjected to the disorientation procedure did not seem to be stressed out when examined by veterinarians, when taken back to the ASG quarters. A guidance mechanism would not have been impaired by such a looping trip or a landmark strategy, whether based on visual, olfactory, or magnetic cues emanating from the home pens. Furthermore, because the distances travelled during the disorientation trip were approximately 22km back and forth, it seems plausible to propose that path integration might be used by camels for homing over short-range distances, which is mediated by idiothetic cues, such as employing their vestibular system for sensing linear and angular accelerations, as it has been described for small mammals (Mittelstaedt and Mittelstaedt, ; Etienne, ; Séguinot et al., ; Etienne et al., ; Etienne and Jeffery, ). Path integration via idiothetic cues would result in error accumulation in estimating home direction relatively quickly (Heinze et al., ; Wehner, ). However, idiothetic path integration is especially vulnerable to the accumulation of internally and externally generated noise, and hence render it an unlikely strategy for long-distance navigation (Mittelstaedt and Glasauer, ; Cheung et al., , ).
It is important to emphasize that the proposition here that path integration is hypothesized to be the general mechanism used for navigation over 67km distance does not exclude using environmental features, whether visual, olfactory, or magnetic cues, for arriving at home. For example, it can be seen from Fig. S6 that all camels seem to converge to a specific route towards the end of their homing trip. In this particular instance, dirt roads seem to be used by the camels while moving. In addition, lights coming from big cities surrounding the study area may well be used for orienting in a specific direction towards home. Attraction to specific features, like small farm remains, or the presence of other camels that might have been wandering in the area can also explain the long stretches and sharp turns that are taken by the camels in some cases.
Could geomagnetic cues have been contributed instead (Kimchi et al., )? Further experimental research on the camels' amazing homing behavior should deal with this question, and particularly extend the approach applied in the present study to larger displacement distances. It is also important to mention here that any compass reference, such as lights, stars, moon, and magnetic cues, and an odometer may have been used instead of idiothetic cues, mentioned above, to calculate the vector towards home. Given the paucity of information about navigational strategies in large cursorial terrestrial mammals (see Introduction), the present study on displacement experiments in camels is an attempt to shed some new light on this topic. A recent study found that dogs may rely on magnetic compass to calibrate their homing runs when using novel routes or a scouting strategy in 33% of cases (Benediktová et al., ). In the absence of familiar landmarks in a forest setting where the experiments were conducted, the authors hypothesized that magnetic cues help the dogs recalibrate a path integrator mechanism based on errors accumulated during the outbound runs, so they do not impact the calculations for homebound trajectory. Previous work had shown that path integration can be reset when the animal is at home base (Alyan, ; Etienne et al., ) or at some goal point (Wehner, ). Thus, the use of a geomagnetic compass in the case of camels cannot be excluded, as stated above.
Camels were recruited from the Advanced Scientific Group (ASG) collection (http://asgroup.ae/; 24., 55.). The ASG is primarily concerned with camel breeding and treatment. The camels never left the ASG husbandries to forage in the surrounding area. However, all of the camels had participated in few races or auctions in other areas that were at least 50km away from ASG husbandries. The camels that participated in such events were hauled in trucks to any event's location, and when the event was finished, they were transported back to the farm. Camels begin participating in such events once they reach 3years of age. So, a camel that is 10years old would have been to more events than a 5-year-old camel.
The camels' collection of the ASG comes from locally bred strains and strains imported mainly from Sudan. All camels used in this study were either lactating or non-lactating females. Their ages ranged from 3- to 19years old. In addition, all female camels used were unfamiliar with the release areas, unless stated otherwise (Table S1).
Most of the camels in the ASG collection are highly prized animals. The offspring of some of the camels we used were sold for $136,000815,000. For minimizing stressing and accidental pathogen transfer to the animals, the experimenters, who had no experience in handling camels, had no direct contact with the experimental animals. Therefore, all contacts with the camels and all the experiments were carried out by shepherds, who had received detailed information about the experimental procedures, and who closely followed the camels during the round-trip journeys.
We worked with as many camels as we could and tried to use the same number of camels for each experimental group. However, this was not always feasible. Sometimes, we had a shortage of camels but needed to finish a specific experiment owing to an upcoming break period. In addition, owing to the COVID-19 pandemic, we were required to stop all experiments for 6months. When we resumed work, many of the camels had been fertilized; thus, few were available. Another important factor was the availability of shepherds.
All camels used in the study were handled by the ASG-assigned shepherds and personnel in adherence to their protocols and regulations. In addition, we obtained approval from the United Arab Emirates University (UAEU) animal ethics committee for this research. All camels that were used for the experiments were examined on the same day, or the next day, by the ASGs veterinarians to ensure there were no signs of physical injuries and behavioral stress that would warrant interrupting the experiments.
The study was conducted around the camel husbandries of the ASG, which were in the Sweihan area (24., 55.; Fig. S1). The experiments were conducted at different times during the year, depending on the availability of shepherds. In summer, we recorded temperatures as high as 69°C, under sunlight, in July . From November to end of March, temperatures were milder. Wind directions and speed were recorded for the days on which we conducted the experiments (Fig. S2). Two locations were selected as release points for experiment 1 (ERP and WRP; Fig. S3). The two points were north of the ASG husbandries. The area between the ASG quarters and the release points comprised sand dunes of differing heights. Sand dunes can be very wide and tall at times (Fig. S4). The area consisted of many continuous sand dunes, interspersed with flat, hard, white ground, called Seihs. On those Seihs, smaller dunes' ridges, a few meters high, also form. It is hard to tell what comes after a dune, big or small, since other dunes can connect immediately to one another, or a huge pit can follow. It is very unsafe to drive and cross dunes during daytime even for experienced desert goers. I never saw anyone crossing dunes at night. The study area has many car tracks, some that go across high dunes. It is heavily patrolled by police SUVs since it is close to a military base. Some dirt routes are found in low areas frequented by SUVs. In addition, there are four to five spots where some camel farms can be found during the winterspring season for 34months. They are mostly ephemeral farms that are abandoned soon after the breeding season. I have seen two permanent farms. The blue square farm on the map is a camel breeding center. As a general rule in desert areas, farms do not have lights at night, and this adds to the risks of driving at night, since all those farms, ephemeral and permanent, have fencing and other structures that cannot be seen unless one bumps into them. We made sure that the ASG quarters were not directly perceptible, at least not visually from the release points. A third location (3rdRP) was selected for release when the camels were hauled in trucks. The 3rdRP was a release point used to unload camels that come to a treatment center to the north of ASG facilities. It was necessary to use that release point because it had a mound that camels use to dismount from the truck. Camels, unlike horses, cannot ascend/descend from a sloping truck tailgate. The tailgate needs to be at a level with the top of the mound. The animals then descend from the mound at their own pace. The same applies for climbing onto the truck; camels need to climb the mound to a point that is in level with the truck tailgate and then walk directly into the truck (Fig. S5).
It is important here to stress that, after releasing a camel at ERP or WRP, the shepherd moved approximately 0.5km north of the release point and waited 1520min before heading back to ensure that the camels were not influenced by the shepherd's path when they started moving. However, after release from the truck, the driver and the shepherd drove away from the area. After release, camels were left to move on their own, with no human presence.
The camels used in all experiments had GPS trackers (Kingsneed TK05®) fitted on them. The GPS tracker was placed in a thick, multi-layered cloth pouch after losing one GPS device that camels chewed on. The pouch was hung around the camel's neck. Positional data were procured every 60s. In one of the camel release trials (on-foot outward journey, experiment 1), three GPS trackers were fitted on the same camel to ascertain the accuracy and congruence of the tracking data, which was verified by graphing the plots. Sometimes, the fixes were absent owing to signal loss.
Paths taken during the homeward journeys were analyzed from the moment the camels were released until they returned to the ASG quarters. The individual mean vector for each track was calculated by taking the average of the directions taken by the camel while moving from one point to the next at a speed of >1km/h (Gagliardo et al., ). The mean vector distribution of each experimental group was tested for randomness using a one-sample Hotelling test (Batschelet, ) for the release site of the group after the homing direction had been standardized to 360°.
In addition, the EI of the tracks (the ratio between the track length and beeline distance between the release site and home) was calculated for each camel in each experimental group, except in cases when camels did not return to their home quarters. All data for each group were presented on x plots showing the second and third quartiles for each group of camels.
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