We hear about screen cages and we hear about glass cages. But what are these hybrid cages? Today I introduce you to the benefits of keeping chameleons in hybrid cages, how to use them, and even how to make your own.
Transcript (More or Less)
Good morning, Chameleon Wranglers! Today we are talking about caging. Specifically, about that often overlooked middle ground between screen cages and glass cages. We call them hybrid cages because they combine screen panels and solid panels to bring out the advantages of both.
Now, to appreciate the hybrid cage we need to elevate ourselves above the screen vs glass debate and develop an understanding around what a cage actually is. Obviously, a cage is designed to be the borders of your chameleon’s world. This is what keeps him from being under foot when we walk in the door. But they also control the ventilation through the cage. A screen is, effectively, 100% ventilation while a glass or plastic or wood side is 0% ventilation. Here in lies the biggest confusion in chameleon caging. That is the need for ventilation. So let’s face it head on.
The common thought is that chameleons need ventilation. This is mostly true, but like everything, it is best that we understand what about ventilation chameleons need. What we are trying to avoid is stagnant air inside the cage. This is because we want the cage to dry out. Constantly wet surfaces are breeding grounds for bacteria, fungus, molds and just a general unhealthful environment. The best way to dry things out is to blow dryer air across it. Moisture evaporates and we have achieved our goal. What better way to do this than to have a fully screen cage with unfettered air movement? Outside of powered fans, that is the most ventilation you will get. But do we really need that much ventilation?
Ventilation affects your environmental conditions within the cage. The more ventilation the more the inside of your cage will match the room temperature and humidity. And the harder it will be for you to change those conditions. The more the required conditions of your selected species differ from the room you live in the less ventilation you want because you need to create a different environment inside the cage.
Temperature is often not an issue. Obviously, this depends on species and what your particular conditions are, but if you, as a human, are comfortable with the temperature there is a good chance your chameleon is comfortable too. The addition of a basking lamp gives the chameleon a warm up opportunity. And then the usual room temperature during the day and the common nighttime drop during the night is often to a chameleon’s liking. These are gross generalizations of course. Some people keep their home at 70 during the night and some people have their homes down to 50 degrees F. Consult your care sheet. But the general concept is the standard room temperature ebb and flow, with the addition of a basking bulb, suits many of our chameleon species just fine. This is why screen cages have been as successful as they have been.
This would be a very short podcast if that was all there was to the story. But we have places where temperatures are not ideal and this is where solid side caging rises to the occasion. The solid sides will hold in the heat and allow a higher temperature inside the cage than in the ambient conditions.
If we have lost ventilation so we can keep heat inside, how do we keep the conditions healthy? The answer is that if you fine tune the ventilation you can block enough air flow to keep in heat, but, at the same time, allow enough ventilation to prevent stagnant air. This introduces the concept that healthful air quality conditions can be maintained with less than 100% ventilation. In fact, it only takes a subtle air flow to achieve this result. This is an example of where we have taken an important concept, ventilation, slammed it all the way to the extreme, and lost the true nature of what we were trying to do.
Many of you know I have my own chameleon caging company. This year, 2020, I made a departure from the norm and my screen cage line was released with a solid back panel. So all sides screen and the back panel solid white PVC. It has been more common than I hoped it would be for people to be concerned that I was blocking airflow. So, there has been a lot of information lost in the community sound bite that chameleons need ventilation. You might then ask, how much ventilation do I need? Well, surprisingly little. Remember, we just need air exchange. Allow me to introduce you to the stack effect or, as we know it in the reptile community, the chimney effect.
This effect is discussed in the design of high rise building or when houses are interested in getting some natural ventilation. It is the recognition, simply, that warm air rises. And when the warm air rises, something has to take its place. That would be the air below it. So, you can imagine that if you have an enclosed space – say, a chimney, or a skyscraper, or a solid side cage – you could create an airflow by having an exit at the top for the warm air and an entry at the bottom for cooler air. The warm inside air would rise and draw in fresh outside air. If this intake vent was to be placed near the floor of the cage then you will create an air exchange that goes through the entire cage. In fact, this is exactly what today’s terrariums do. They have air vents near the bottom of the cage and a screen top. Our use of a basking bulb provides a perfect air warming up top and there is an airflow going on all day. Even without the basking lamp, the heating up of the air at the top of our cages by our light systems will do the job. So this is why the glass terrariums available today do not have the problem of stagnant air. Now, it is important that you verify that the glass cage you are getting has these vents as not all do, but the major manufacturers do. This was not taken into account when the screen cage sound bites were born because these vented terrariums are relatively new.
Now, hybrid cages. If glass cages now have the ventilation they didn’t before then why is that not the end of the conversation? Well, glass cages have size issues. They are very heavy and break. You can get glass cages at any size, but they become difficult to manage at the sizes needed for adult chameleons. So this is where hybrid cages come in. By integrating lighter acrylic and PVC sheets we can create a solid side cage that is in an acceptable size for our chameleons, is light weight enough to be handled by one person, and can be broken down to be shipped and assembled at the final destination. So this approach gives us chameleon keepers a chance to enjoy the benefits of a solid side cage.
With that out of the way, I’d like to talk about the benefit of solid sides cages that will be valuable to almost every chameleon keeper. And that is humidity control. These latest caresheets are focusing more and more on high nighttime humidity - Up to 100% humidity. I can guarantee, unless you wake up to dew on the surfaces in your room, your house does not get to 100% humidity. So this is why we chameleon people mist and fog during the night. In a screen cage it is somewhat pitiful. Our fogger creates a column of fog a few inches in diameter that disappears quickly as it gets eaten up by the less humid ambient conditions. But put that fogger going into a solid side cage and you soon realize that, instead of pumping in as much fog as you can to hope to get barely enough, you now have to manage the fog input to make sure it does not get overwhelming. You can get the levels you are looking for with much less fog – or heat for that matter. The difference is, on one hand -with maximum ventilation- you are struggling to get enough. On the other hand, -with a network of solid side panels -you are now in a position to be giving too much. The advantage to the latter is that it is easy for you to reduce the fog or heat input.
And this is why you see so many advanced keepers using solid side cages. This is why I worked so hard to develop the hybrid cage designs for my caging company. It is because we now have control over the humidity levels and we are recognizing the huge effect this has on proper hydration and chameleon health.
Sounds wonderful…how do we set one of these hybrid cages up?
First, let’s talk about getting a hybrid cage. The most effective ones usually take the form of three PVC panels for the back and sides. If you just have this with a screen front then you are already gaining the benefit of the hybrid cages because you can trap humidity against the walls by creating a thick wall of live plants through the middle of the cage. So you see all this foliage, but there is a corridor behind that wall of plants that the chameleon can access. And this becomes a humidity trap that your chameleon will appreciate. If you add an acrylic panel to the front then you are increasing the hybrid benefit, but you will need to ensure there is a chimney effect dynamic. In my cages at Dragon Strand, this takes the form of an acrylic main door and a smaller screen service door at the bottom of the front. And that, combined with the screen top panel, gives me my chimney effect. Every year there pops up another cage manufacturer. If you are looking at the newest model, simply make sure there is a screen intake near the floor and a screen top to complete the effect.
Transforming a screen cage
Hybrid cages can be expensive. And many of you may not want to buy a professionally made one just yet. So there are simple ways to turn your present standard screen cage into a hybrid cage. You have two panel types to work with, clear and opaque. To make opaque sides go to the home improvement store and pick up some white PVC panels or coroplast, that’s the corrugated plastic sheeting that people use for lawn signs and such. Just get it big enough to fit your cage sides. Of course, you can do it in pieces if need be. All it needs to do is be solid enough to block mist. So, technically, you could accomplish this with a black trash bag. What material you use depends on how you want this to look. I strongly suggest attaching it to the frame instead of the screen. The less there is attached to the screen the better. So just get the pieces wide enough to go from frame to frame and attach them to the frame. Don’t be shy over using screws driven directly into the aluminum framing to hold a panel of PVC on to the cage. This is your cage. Go ahead and make it what you want it to be.
Clear panels are even simpler. You go to your home improvement store or just Amazon and get Shrink Film Insulator kits. This kit gives you double sided tape that you line around the cage panel frame and a thin clear film that you stick on to this tape. Cut to size and take a hair dryer to it. The heat shrinks the film tight and you suddenly have a clear front door to your screen cage. Although it sounds like you are hacking the cage, which you are, it doesn’t have to look like a hack job if you do it carefully. And it works well enough as far as the chameleon is concerned.
As far as clear vs. opaque, you can use either on any panel of your cage and realize significant humidity benefits. Now you can mist as much as you want without worrying about getting water on the walls behind the cage and now your fogging will be much more effective in raising humidity. If you were thinking about getting a hybrid cage you can always try it out this way before making the final decision. Obviously, the professional cages will look better, but it doesn’t hurt to try the functionality out first.
I like to use opaque panels on the sides and back. And then I have a clear main door. That leaves the flip-up service door and top panel being screen to provide that chimney effect we are looking for. You may be interested in making the sides clear as well using this method, but there is a pro and con to this. The pro is that it is a lot of fun doing the window film and you will have a lot left over so it just seems wrong not to use more. The con is that an opaque side actually adds an increased sense of security for the chameleon as they know they do not have to visually monitor that side for predators. Which is best depends on your situation and your chameleon.
Once you have your hybrid cage in whatever form it is, you will need to adjust your husbandry. Remember that most google search and social media advice is for screen cages. You notice how most descriptions about chameleon husbandry usually do not worry about an off time for the basking bulb or the misting system or the fogger? And that is because in the realm of screen cages it really doesn’t matter much. As soon as you stop the cage environment quickly reverts back to the room ambient conditions. This is where you will have to be smart and understand why you are doing things. In a hybrid cage, both heat and humidity will build up. And that is exactly what you want! But I want to be clear, this isn’t a case where hybrid (or glass cage) keeping is more “advanced” than screen cages. Hybrid cages are more effective in providing proper husbandry. It is actually doing the job better Because it is not natural for the proper humidity level to be present only within a few inch diameter cone coming from the fogger. Although the chameleons make the best of it. It is interesting how they find where that fogger projects on even if you have the fogger on only during the night. Somehow they know where it will be and they fall asleep in that cone!
So, how do we set up a hybrid cage. It is actually the same as a screen cage. You have a basking bulb, misters, foggers, daylight and UVB. The major difference is that you will have to dial in the run time of the basking bulb and misters. With the basking bulb you will may now just leave it on a few hours in the morning. Just like any cage, there is no hard fast rule. The length of time depends on how cold the nights are, how cool the mornings are and everything else we need to take into account in any cage set-up. The only major difference is that you introduce the concept of turning the heat lamp off when you have achieved your goal. Same with the mister and the fogger. What screen cage users will now have to get used to is the concept that they actually can reach the desired temperature and humidity targets! Consider that for a minute. Have you ever tried raising the humidity in a screen cage? If you have been a keeper for any length of time you have spend a great deal of time trying to reach the recommended levels. It is so frustrating that some people have given up trying to get it and switched to arguing that high humidity is not needed. Well, how about switching over to a hybrid set-up and see how chameleon husbandry actually is when you can reach the target parameters. And then you can see for yourself how much better the chameleons do when they have the correct hydration parameters. I have switched over not because it was the newest thing and I needed a change in my life. I have switched over to the naturalistic hydration that hybrid cages facilitate because I saw the difference it made.
The major skill that will have to be developed for solid side cages, both hybrid and glass, is measuring the temperature and humidity levels.
For temperature a simple thermometer will do. We are used to measuring the basking spot, and you should continue to do that, but you also keep an eye on the ambient temperature within the cage. This will now be different from the ambient temperature outside the cage. Once your cage has heated up to where it should be - you shut off the basking bulb. And now the equalization time period to where the inside cage temperature matches the outside depends on how much ventilation there is and the insulation properties of the materials used for the sides. There isn’t a formula – at least not a reasonable one that I can share now – it just takes you keeping an eye on things. Here is also where you have hopefully made the right decision as to the type of cage you get. You asked yourself how much insulation you needed and got the cage that offered that level of insulation.
The materials I use in the Dragon Strand cages are PVC and acrylic. These don’t have that great of temperature insulation properties. The reason is that the main purpose for these walls is humidity control. You will notice that the mist stays on the leaves a whole lot longer after your misting session. The Chameleon Academy species caresheets and website promote a system where you give a good misting at around 1AM and then start a fogger. You then fog until right before you turn on the lights in the morning, but you give one last misting session before the lights come on. All of that dew sticks around as the chameleon make its way to the basking bulb and the chameleon lives in a humid, dew filled world for a while. It is the solid walls that allow the dew to stay around. But then I hear from people in humid areas that there then becomes too much humidity. And to that I say, yes, we need to be careful not to overwhelm the system. But a hybrid cage does not create humidity beyond that which is given off by the plants and their soil. There is too much humidity in there only if we put too much in there. If you live in a high humidity area then maybe you do not need to fog as much through the early morning. Maybe the misting sessions to coat the surfaces with dew are ten seconds instead of 2 minutes. This is where you are now given control of the parameters instead of constantly striving to achieve them.
I hate to complicate things further, but there is a significant difference between creating a hydration cycle that mimics their natural conditions as the Naturalistic Hydration method does, and a hydration method that is designed to get chameleons to drink in front of you. Just a brief recap, the naturalistic hydration method we talk about mimics the natural conditions of high humidity during the night, up to 100%, and then lower humidity during the day. This prevents dehydration during the night via breathing. The chameleon then hydrates by drinking the dew in the morning and that, combined with the appropriate daytime humidity is all that is needed. A dripper during the afternoon provides a good check to see if the hydration methods are sufficient. If the chameleon drinks during this test period then the evening regimen must be extended in some manner. Please review this on the chameleonacademy.com website for details. But this is a method that follows their natural hydration and has a check and balance in the afternoon to make sure it is working so it a nice neat package of hydration that works exceptionally well in a hybrid cage.
I need to explain the daytime hydration method because it is the old way, but still very common. And, spoiler alert, it doesn’t work as well with the hybrid cage. But since you will hear about it from many places we need to discuss it. The daytime hydration method is simply many misting sessions during the day. And the misting sessions are long enough that the chameleon settles in to drink. And this can take minutes of running away to avoid the spray and then finally settling in because they can’t get away from it. After a while of sitting in the mist they eventually start drinking. I don’t want to dive deep into the comparing these two methods because there is a lot to go over. I know it sounds simple, but every point ties into another and before long you have a huge mess of topics. But, suffice to say, that a hydration strategy that uses a behavior (ie drinking) to end the misting session and not a humidity level, could easily over soak a cage. If this were a good hydration method then it would be best carried out in a screen cage. We have moved beyond that to the naturalistic hydration method which I feel is far superior on so many levels so we can now use a cage which better facilitates the naturalistic hydration method. Wait a minute, you say, isn’t the chameleon drinking a good thing and what we are looking for? Well, kind of. A well hydrated chameleon will drink reflexively if they can’t get away from the spray. This does not necessarily mean they needed to drink. You can see how this becomes a never ending loop where the chameleon drinks because it is a reflex and so we spray more and they keep drinking and we spray more until they just can’t handle any more. Hydration and dehydration is a big topic which I have reviewed in other episodes. Suffice to say at this point that our goal is to have our chameleon
Before we close I’d like to go over a couple of miscellaneous topics pertaining to hybrid cages.
- When you deal with glass , acrylic or any clear material, you will get some sort of reflection in certain lighting at certain angles. How much of a problem this is for chameleons varies with who you talk to. I have breeders that breed generations in glass or acrylic fronted cages with no reflection issues and then I get someone saying their chameleon is reacting to a reflection. Bottom line is that reflections are like anything else in chameleon husbandry. If you have them (and your chameleon cares about it) then you adjust to situation. Just like any other parameter. Move the lights right above the door, don’t have the internal lights on when the outside is dark, move a spring of leaves in the way if there is one particular spot that is an issue. Whatever it is, it is just another thing we deal with. The benefits of a hybrid cage are much greater than the challenge of dealing with a reflection.
- You will see some hybrid cage keepers using fans to increase air circulation. Once again, this all depends on the type of cage and what kind of air circulation strategy it uses – or doesn’t use. There are many personal mini fans available or computer fans which can be placed in areas where they draw air out of the cage. But only use fans if you need it. If the minimum fogging and misting creates a situation where the surfaces inside the cage do not dry then that justifies creating more air flow.
- Respiratory Infections. I have to include this because that is the most often sited reason for needing full screen cages. Solid sides do not cause respiratory infections. Stagnant air causes respiratory infections. As we have just gone over, If you ensure the particular cage you get has accommodations for it, we get the air circulation necessary to have a healthy environment.
In conclusion, the hybrid cage is the next step in our community’s caging future. It gives us control over the humidity cycle which is the one parameter least given attention to in our recent past. And if you aren’t sure about them they are easy to mock up on your standard screen cage. Try it. We will be moving in that direction slowly but surely.
Thank you. Very much for joining me here for this discussion about hybrid cages. I have enjoyed my work with them and the results I have gotten. And I encourage all of you to give hybrid cages a try!