Category Archives: Whistling Thorn

The Spider and the Ant

Dear All – having been weighing and counting ants on the Whistling Thorns for some research work related to my PhD. There are a few alates around – these are the winged reproductive forms of ants… Each colony produces many hundreds, even thousands of alates that take off into the sky as part of a synchronised mating flight. Female alates become future queens, they are larger than the males. Male alates only live for the day of the mating flight – they have one chance to mate. They can never return to their colony once they depart. All of them will die within a day of departing on the mating flight…

Here is an illustration of the alates of the three common ant species on the Whistling Thorn trees in East Africa:

Alates - winged queens and males of the Whistling Thorn ants

Alates - winged queens and males of the Whistling Thorn ants (the black bar is for scale - it represents 1 cm or 1o mm)

Most of the them don’t make it and end up as food for birds, other ants and spiders.

I found this Jumping Spider eating a freshly captured young foundress queen…

Jumping Spider with Acacia-ant alate (winged queen)

Jumping Spider with Acacia-ant alate (winged queen)

The spider lives among the ants and dodges them by constantly keeping on the move, occasionally nabbing one of the hapless ants for a snack! Jumping Spiders are ambush predators that use their athletic skills and fantastic vision to capture prey. They have more than two pairs of eyes (in fact 4 pairs in total, with two pairs facing forward that are very well developed…)

How many eyes can you see on the spider?

How many eyes can you see on the spider?