There is a world somewhere between reality and fiction. Although ignored by many, it is very real and so are those living in it. This forum is about the natural world. Here, wild animals will be heard and respected. The forum offers a glimpse into an unknown world as well as a room with a view on the present and the future. Anyone able to speak on behalf of those living in the emerald forest and the deep blue sea is invited to join.
redyaguarete - PYRAGüE again in front of our cameras. This very large male is a clear example of the use that an adult jaguar makes of the territory; since it is registered in both provincial and private protected areas and productive properties (as in this photo) where forestry and lowland livestock are developed, in the province of Misiones.
Nos apoyan y acompañan en el Programa de Monitoreo Poblacional de Yaguaretés en la Argentina (ProMoPYA) @s.o.saccionsalvaje y @fundacionazara
Hi guys, someone informed me about the conversation you were having on jaguar coalitions on the predation thread and I decided to stop by to give some information.
I made a post that went over that paper in my community but I'm going to include some key takeaways here:
The paper in question studied the interactions of several jaguar coalitions in the Venezuelan Llanos and Pantanal, across 5 different areas within those eco-regions. Most of the interactions between males recorded involved cooperative behaviour/coalitions, with lesser observations of violent behaviour.
The researchers found that there was a direct correlation between the formation of jaguar coalitions and the density of females in a particular area, which in turn is dependent on the availability of prey in that area. The same cause is what drives male lions and cheetahs to form coalitions.
The paper also touched on a very important point that could have fostered these sorts of interactions among jaguars, and that is the prey availability during the Pleistocene, which used to be much higher in South America prior to the mass extinction of the Quaternary period.
As large and plentiful prey increases the number of female jaguars, that in turn fosters social pairings and the creation of coalitions in males. While the native megafauna of South America is for the most part gone, to an extent the introduction of large quantities of cattle has allowed for the replication of these sorts of ecological systems to a lesser degree.
While this paper touched upon two eco-regions, the Orinoco Llanos (Colombia, Venezuela), and the Pantanal (Brazil, Paraguay, Bolivia), indirect evidence seem to suggest that this phenomenon is also in other eco-regions with less available data, particularly the Chaco, where prey densities and jaguar body mass and size are also very close to the Llanos and Pantanal.
To finish off the breakdown of this paper, it is very clear that jaguars are social creatures and the idea of them being completely solitary animals is outdated and should not be continued. Male jaguars will form coalitions in areas with high prey density and as a result high female densities as well. Female densities were the main factor for the formation of jaguar coalitions, just as it occurs with lions and cheetahs. The coalition behaviour and structure among jaguars much closely resembled that of lions, including patrolling together, mating with females in the presence of the accompanying coalition male, and fighting/killing adversaries as well as taking over their territory.
While this particular study did not record instances of the jaguar coalition hunting collaboratively together, as the paper mentions, it is possible that this takes place and more research needs to be conducted to record instances of such nature. Perhaps with large-bodied prey like free-ranging cattle, feral buffaloes and horses, which are found in the two studied regions, collaborative hunting will be eventually recorded as well, something that may have happened with the native megafauna that jaguars used to cohabit with during the Pleistocene. This paper is simply the first look at a very intriguing body of research on jaguar ecology.
In regards to Xando/Bororo. Xando has not been seen in the Porto Jofre area since 2021 I believe, but Bororo has cemented himself as a dominant male in the area. We don't know if they eventually went their own way or if something happened to Xando (poaching, being killed by another jaguar, infection, etc.). Bororo was seen in 2021 with a nasty wound to the face after fighting with what was at the time a new male in the area named Bagua for mating rights, which Bororo won and was left with a deep wound to the face:
*This image is copyright of its original author
*This image is copyright of its original author
What's amazing is that the wound ended up healing pretty well and there is almost not trace of it on his face nowadays:
*This image is copyright of its original author
What's even more amazing is that the male he fouhgt, Bagua, ended up forming a colation with another local and larger male named Xingu. We've named the coalition Cuachicqueh, Nahuatl term for an elite warrior class from Aztec society. They are still together as they were recorded a few days ago:
*This image is copyright of its original author
*This image is copyright of its original author
*This image is copyright of its original author
There is also another coalition of some huge males recently recorded at Reserva Santa Sofia in the southern Pantanal, an area that is tracked by Onçafari. The names of the coalition partners are Tico and Teco, we don't know if they are related:
Hi guys, someone informed me about the conversation you were having on jaguar coalitions on the predation thread and I decided to stop by to give some information.
I made a post that went over that paper in my community but I'm going to include some key takeaways here:
The paper in question studied the interactions of several jaguar coalitions in the Venezuelan Llanos and Pantanal, across 5 different areas within those eco-regions. Most of the interactions between males recorded involved cooperative behaviour/coalitions, with lesser observations of violent behaviour.
The researchers found that there was a direct correlation between the formation of jaguar coalitions and the density of females in a particular area, which in turn is dependent on the availability of prey in that area. The same cause is what drives male lions and cheetahs to form coalitions.
The paper also touched on a very important point that could have fostered these sorts of interactions among jaguars, and that is the prey availability during the Pleistocene, which used to be much higher in South America prior to the mass extinction of the Quaternary period.
As large and plentiful prey increases the number of female jaguars, that in turn fosters social pairings and the creation of coalitions in males. While the native megafauna of South America is for the most part gone, to an extent the introduction of large quantities of cattle has allowed for the replication of these sorts of ecological systems to a lesser degree.
While this paper touched upon two eco-regions, the Orinoco Llanos (Colombia, Venezuela), and the Pantanal (Brazil, Paraguay, Bolivia), indirect evidence seem to suggest that this phenomenon is also in other eco-regions with less available data, particularly the Chaco, where prey densities and jaguar body mass and size are also very close to the Llanos and Pantanal.
To finish off the breakdown of this paper, it is very clear that jaguars are social creatures and the idea of them being completely solitary animals is outdated and should not be continued. Male jaguars will form coalitions in areas with high prey density and as a result high female densities as well. Female densities were the main factor for the formation of jaguar coalitions, just as it occurs with lions and cheetahs. The coalition behaviour and structure among jaguars much closely resembled that of lions, including patrolling together, mating with females in the presence of the accompanying coalition male, and fighting/killing adversaries as well as taking over their territory.
While this particular study did not record instances of the jaguar coalition hunting collaboratively together, as the paper mentions, it is possible that this takes place and more research needs to be conducted to record instances of such nature. Perhaps with large-bodied prey like free-ranging cattle, feral buffaloes and horses, which are found in the two studied regions, collaborative hunting will be eventually recorded as well, something that may have happened with the native megafauna that jaguars used to cohabit with during the Pleistocene. This paper is simply the first look at a very intriguing body of research on jaguar ecology.
In regards to Xando/Bororo. Xando has not been seen in the Porto Jofre area since 2021 I believe, but Bororo has cemented himself as a dominant male in the area. We don't know if they eventually went their own way or if something happened to Xando (poaching, being killed by another jaguar, infection, etc.). Bororo was seen in 2021 with a nasty wound to the face after fighting with what was at the time a new male in the area named Bagua for mating rights, which Bororo won and was left with a deep wound to the face:
*This image is copyright of its original author
*This image is copyright of its original author
What's amazing is that the wound ended up healing pretty well and there is almost not trace of it on his face nowadays:
*This image is copyright of its original author
What's even more amazing is that the male he fouhgt, Bagua, ended up forming a colation with another local and larger male named Xingu. We've named the coalition Cuachicqueh, Nahuatl term for an elite warrior class from Aztec society. They are still together as they were recorded a few days ago:
*This image is copyright of its original author
*This image is copyright of its original author
*This image is copyright of its original author
There is also another coalition of some huge males recently recorded at Reserva Santa Sofia in the southern Pantanal, an area that is tracked by Onçafari. The names of the coalition partners are Tico and Teco, we don't know if they are related:
*This image is copyright of its original author
Just to add a few more things, I remember Paulo telling me that Jaguars in the N. (and I'm sure S.) aren't the same type of "territorial."
You can see rival males within very close proximity to one another, even laying together or sharing a meal then the next season you can them fighting each other or one of them being ran off, etc.
Both of our theories were similar, because the Pantanal's landscape is forever changing there is no need to be "territorial" since said territory can be completely under water season to season. Really it comes down to females in heat or food with females in heat probably being the biggest instigator.
Hi guys, someone informed me about the conversation you were having on jaguar coalitions on the predation thread and I decided to stop by to give some information.
I made a post that went over that paper in my community but I'm going to include some key takeaways here:
The paper in question studied the interactions of several jaguar coalitions in the Venezuelan Llanos and Pantanal, across 5 different areas within those eco-regions. Most of the interactions between males recorded involved cooperative behaviour/coalitions, with lesser observations of violent behaviour.
The researchers found that there was a direct correlation between the formation of jaguar coalitions and the density of females in a particular area, which in turn is dependent on the availability of prey in that area. The same cause is what drives male lions and cheetahs to form coalitions.
The paper also touched on a very important point that could have fostered these sorts of interactions among jaguars, and that is the prey availability during the Pleistocene, which used to be much higher in South America prior to the mass extinction of the Quaternary period.
As large and plentiful prey increases the number of female jaguars, that in turn fosters social pairings and the creation of coalitions in males. While the native megafauna of South America is for the most part gone, to an extent the introduction of large quantities of cattle has allowed for the replication of these sorts of ecological systems to a lesser degree.
While this paper touched upon two eco-regions, the Orinoco Llanos (Colombia, Venezuela), and the Pantanal (Brazil, Paraguay, Bolivia), indirect evidence seem to suggest that this phenomenon is also in other eco-regions with less available data, particularly the Chaco, where prey densities and jaguar body mass and size are also very close to the Llanos and Pantanal.
To finish off the breakdown of this paper, it is very clear that jaguars are social creatures and the idea of them being completely solitary animals is outdated and should not be continued. Male jaguars will form coalitions in areas with high prey density and as a result high female densities as well. Female densities were the main factor for the formation of jaguar coalitions, just as it occurs with lions and cheetahs. The coalition behaviour and structure among jaguars much closely resembled that of lions, including patrolling together, mating with females in the presence of the accompanying coalition male, and fighting/killing adversaries as well as taking over their territory.
While this particular study did not record instances of the jaguar coalition hunting collaboratively together, as the paper mentions, it is possible that this takes place and more research needs to be conducted to record instances of such nature. Perhaps with large-bodied prey like free-ranging cattle, feral buffaloes and horses, which are found in the two studied regions, collaborative hunting will be eventually recorded as well, something that may have happened with the native megafauna that jaguars used to cohabit with during the Pleistocene. This paper is simply the first look at a very intriguing body of research on jaguar ecology.
In regards to Xando/Bororo. Xando has not been seen in the Porto Jofre area since 2021 I believe, but Bororo has cemented himself as a dominant male in the area. We don't know if they eventually went their own way or if something happened to Xando (poaching, being killed by another jaguar, infection, etc.). Bororo was seen in 2021 with a nasty wound to the face after fighting with what was at the time a new male in the area named Bagua for mating rights, which Bororo won and was left with a deep wound to the face:
*This image is copyright of its original author
*This image is copyright of its original author
What's amazing is that the wound ended up healing pretty well and there is almost not trace of it on his face nowadays:
*This image is copyright of its original author
What's even more amazing is that the male he fouhgt, Bagua, ended up forming a colation with another local and larger male named Xingu. We've named the coalition Cuachicqueh, Nahuatl term for an elite warrior class from Aztec society. They are still together as they were recorded a few days ago:
*This image is copyright of its original author
*This image is copyright of its original author
*This image is copyright of its original author
There is also another coalition of some huge males recently recorded at Reserva Santa Sofia in the southern Pantanal, an area that is tracked by Onçafari. The names of the coalition partners are Tico and Teco, we don't know if they are related:
*This image is copyright of its original author
thank you so much, i really appreaciate all that information that u put in ur post. I feel bad thinking about the possibility that Xando could be gone, he was such a unique jaguar, but hopefully he's out there living his life.
@Pckts @Balam sorry for mention u guys, but im really interested if y'all have any info about Marley measurements? (weight, shoulder height, length) (some pictures of marley that i found out there...) Marley, by Sue Roehl: "Marley A Male Jaguar At The River's Edge ( Panthera onca)"
*This image is copyright of its original author
"on the Riverbank"
*This image is copyright of its original author
*This image is copyright of its original author
The following 1 user Likes Ngonya's post:1 user Likes Ngonya's post • Horizon
05-04-2023, 08:52 PM( This post was last modified: 05-05-2023, 07:46 AM by Balam )
@Ngonya the last record I have of Juru/Marley is from late March of this year, from this local guide:
*This image is copyright of its original author
Juru is now a much more mature male and he has never been captured or weighed. It's hard to give a specific value for his weight or measurements going solely by photos online.
Juru has never been particularly robust when compared to other jaguars from that region, but his frame has always been large.
A healthy male Pantanal jaguar of 4+years of age will weigh 110+ kg on average (data compilation on their sizes based on modern record), so I think for a specimen like Juru that is at the peak of his growth years (he should be 8-9 years old roughly), I can say that somewhere in between 110-125 kg could be reasonable for him.
I think for shoulder height, Juru could reach if not surpass 80 cm. And for body length, following the curves of the body from head to body without the tail, maybe 150-160 cm.
(05-04-2023, 08:52 PM)Balam Wrote: @Ngonya the last record I have of Juru/Marley is from late March of this year, from this local guide:
*This image is copyright of its original author
Juru is now a much more mature male and he has never been captured or weighed. It's hard to give a specific value for his weight or measurements going solely by photos online.
Juru has never been particularly robust when compared to other jaguars from that region, but his frame has always been large.
A healthy male Pantanal jaguar of 4+years of age will weigh 110+ kg on average (data compilation on their sizes based on modern record), so I think for a specimen like Juru that is at the peak of his growth years (he should be 8-9 years old roughly), I can say that somewhere in between 110-125 kg could be reasonable for him.
I think for shoulder height, Juru could reach if not surpass 80 cm. And for body length, following the curves of the body from head to tail, maybe 150-160 cm.
Hope this helped and thanks for the tag!
Thank u so much, i didnt know he was also named Juru! So all those videos of a jaguar named juru are about him huh , he had brief encouters with Geoff, Balam and Zangado if its the same Juru that im thinking about!
The following 1 user Likes Ngonya's post:1 user Likes Ngonya's post • Balam
(05-04-2023, 08:52 PM)Balam Wrote: @Ngonya the last record I have of Juru/Marley is from late March of this year, from this local guide:
*This image is copyright of its original author
Juru is now a much more mature male and he has never been captured or weighed. It's hard to give a specific value for his weight or measurements going solely by photos online.
Juru has never been particularly robust when compared to other jaguars from that region, but his frame has always been large.
A healthy male Pantanal jaguar of 4+years of age will weigh 110+ kg on average (data compilation on their sizes based on modern record), so I think for a specimen like Juru that is at the peak of his growth years (he should be 8-9 years old roughly), I can say that somewhere in between 110-125 kg could be reasonable for him.
I think for shoulder height, Juru could reach if not surpass 80 cm. And for body length, following the curves of the body from head to tail, maybe 150-160 cm.
Hope this helped and thanks for the tag!
Thank u so much, i didnt know he was also named Juru! So all those videos of a jaguar named juru are about him huh , he had brief encouters with Geoff, Balam and Zangado if its the same Juru that im thinking about!
It's him! He's somehow managed to be one of the most longstanding males in Porto Jofre since he still resides on that area.
One quick correction, I meant head-to-body not head-to-tail on my lenght estimation for him.
The following 1 user Likes Balam's post:1 user Likes Balam's post • Ngonya
(05-04-2023, 08:52 PM)Balam Wrote: @Ngonya the last record I have of Juru/Marley is from late March of this year, from this local guide:
*This image is copyright of its original author
Juru is now a much more mature male and he has never been captured or weighed. It's hard to give a specific value for his weight or measurements going solely by photos online.
Juru has never been particularly robust when compared to other jaguars from that region, but his frame has always been large.
A healthy male Pantanal jaguar of 4+years of age will weigh 110+ kg on average (data compilation on their sizes based on modern record), so I think for a specimen like Juru that is at the peak of his growth years (he should be 8-9 years old roughly), I can say that somewhere in between 110-125 kg could be reasonable for him.
I think for shoulder height, Juru could reach if not surpass 80 cm. And for body length, following the curves of the body from head to tail, maybe 150-160 cm.
Hope this helped and thanks for the tag!
Thank u so much, i didnt know he was also named Juru! So all those videos of a jaguar named juru are about him huh , he had brief encouters with Geoff, Balam and Zangado if its the same Juru that im thinking about!
It's him! He's somehow managed to be one of the most longstanding males in Porto Jofre since he still resides on that area.
One quick correction, I meant head-to-body not head-to-tail on my lenght estimation for him.
Hi Balam, i was reading about the male coalitions of Jaguars u posted in the reddit (r/jaguarland), and the ones who caught my attention were katu and cage. (Holyfield and Iko) Holyfield/Katu
*This image is copyright of its original author
*This image is copyright of its original author
Iko/Cage
*This image is copyright of its original author
*This image is copyright of its original author
Could u tell me who's who in this video you posted on reddit? (who is the bigger and who is the smaller among these two in the below pic from the video)
(05-04-2023, 08:52 PM)Balam Wrote: @Ngonya the last record I have of Juru/Marley is from late March of this year, from this local guide:
*This image is copyright of its original author
Juru is now a much more mature male and he has never been captured or weighed. It's hard to give a specific value for his weight or measurements going solely by photos online.
Juru has never been particularly robust when compared to other jaguars from that region, but his frame has always been large.
A healthy male Pantanal jaguar of 4+years of age will weigh 110+ kg on average (data compilation on their sizes based on modern record), so I think for a specimen like Juru that is at the peak of his growth years (he should be 8-9 years old roughly), I can say that somewhere in between 110-125 kg could be reasonable for him.
I think for shoulder height, Juru could reach if not surpass 80 cm. And for body length, following the curves of the body from head to tail, maybe 150-160 cm.
Hope this helped and thanks for the tag!
Thank u so much, i didnt know he was also named Juru! So all those videos of a jaguar named juru are about him huh , he had brief encouters with Geoff, Balam and Zangado if its the same Juru that im thinking about!
It's him! He's somehow managed to be one of the most longstanding males in Porto Jofre since he still resides on that area.
One quick correction, I meant head-to-body not head-to-tail on my lenght estimation for him.
Hi Balam, i was reading about the male coalitions of Jaguars u posted in the reddit (r/jaguarland), and the ones who caught my attention were katu and cage. (Holyfield and Iko) Holyfield/Katu
*This image is copyright of its original author
*This image is copyright of its original author
Iko/Cage
*This image is copyright of its original author
*This image is copyright of its original author
Could u tell me who's who in this video you posted on reddit? (who is the bigger and who is the smaller among these two in the below pic from the video)
*This image is copyright of its original author
Do u have any more pictures/videos of them?
Both Iko and Katu were actually not that big in size for mature male jaguars from the Pantanal. If you check the dataset, you will see their weights recorded: Iko (110 kg), Katu (105 kg). You can see the slight size difference in the screenshot of the video you included as Iko is the one at the front and Katu is the one at the back. There are a few more photos of them together but I don't have them with me at the moment.
These males are actually mentioned as one of the coalitions studied in the paper I linked earlier, these are them confronting an introducing young male from their territory:
*This image is copyright of its original author
The following 1 user Likes Balam's post:1 user Likes Balam's post • Ngonya
I wish I could've fit Tito in the Porto Jofre compilation, alongside Edno and Balam he was the largest jaguar's I've ever seen from that area. Here are the three brutes, Tito, Balam, Edno:
I wish I could've fit Tito in the Porto Jofre compilation, alongside Edno and Balam he was the largest jaguar's I've ever seen from that area. Here are the three brutes, Tito, Balam, Edno:
*This image is copyright of its original author
what about the dominant males from Porto Jofre, all of them gone by now or they are still standing and holding on their ground?
I wish I could've fit Tito in the Porto Jofre compilation, alongside Edno and Balam he was the largest jaguar's I've ever seen from that area. Here are the three brutes, Tito, Balam, Edno:
*This image is copyright of its original author
what about the dominant males from Porto Jofre, all of them gone by now or they are still standing and holding on their ground?
Of the ones in the collage Odin and Inka remain that I know of. There are a few others that I didn't include because of space like your favorite Juru, the Cuachicqueh coalition, Bororo, etc. Once safari season begins in a few months we will see if newer specimens pop up or if others return.
The following 1 user Likes Balam's post:1 user Likes Balam's post • Ngonya
, he had brief encouters with Geoff, Balam and Zangado if its the same Juru that im thinking about!
