Yupukari Village, Guyana March 2018
From sun up to sun down, researching red-bellied macaws in the Rupununi savannah
The Rupununi savannah in Guyana is full of life. Hard to traverse due to flooding much of the year, it is now March 2018 and we are driving along paths that we could have swum or boated over in the rainy season. We approach Yupukari village in Guyana to continue our investigation of parrots that started in October 2017. One of our target species is the red-bellied macaw that roosts, nests, and feeds in the Ite palm oases throughout the area.
Pair checking out a nest or roosting cavity in Ite palm trunk
We use a population counting technique known as Fixed Point Transects that allow one to get a rapid assessment of the minimum number of distinct individuals in an area. For this particular count we had 3 counting points spread out over 4.5 kilometers. These points are really too far apart to get a precise count, and we don’t mind so much because this is just a preliminary survey to see how many birds there might be here and how the birds use the oases. We also want to discover what might be the best methods for counting this species in this habitat.
Double-stripped thick-knee and chick in savannah, spied on our way to set up points for the count
In our short time there, conducting only one formal count, we found that counting these birds between oases is challenging, or even counting them in one oasis. They sleep communally in cavities in the same trees where they perch. This basically means that we lose sight of them and cannot be sure if they have moved off or have stayed in a particular area.
Point #1 in our 3-point transect
They are also incredibly squirrely and swirly birds. They may approach an oasis in one flock, but then they split off, presumably in family groups or multiple families, and then these groups recombine with other groups or pairs, take off flying again, swirl around an oasis, pick up more birds, and either land again (and again) or head off to another oasis. For this reason, we can only offer an estimate of 253 red-bellied macaws observed along a 4.5 kilometer area. It will take repeated counts to get more precise results and to perfect the technique.