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Warm up singing
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Of Special Interest
   
 


There are three different species singing: 
The intermittent rolling chirp is Oecanthus allardi.
The intermittent short bursts of trilling is Oecanthus leptogrammus.
The continuous trilling is a new species - Baker's tree cricket.


A total of 5 new species from Nicaragua were described in the Transactions of the American Entomological Society. http://taes.entomology-aes.org/pages/show/products-2


 

Oecanthus bakeri.  The common name is deemed Baker's tree cricket.

Note the orange on the head and joints -- and pale antennae.


Frontal view of the base of the antennae.


Note the black spot on the 'knee' joint and the black slash marks on the femur.

Note the female to the left of the male behind the leaf.  You can see her right-sided limbs and her ovipositor.

This species makes a continuous trill. 
[Note: Videos will not play with Microsoft Edge]


Female - note the dark slash marks on the femurs.

This young nymph of new species #1 was found within 2 feet of the above adult male.  The pattern on the top surface of the abdomen matches those in the varicornis group.



Oecanthus symesi.  The common name is deemed Golden tree cricket.

This is the male.  Note the golden yellow color and VERY narrow wings.


This is the female Golden tree cricket.




Neoxabea cerrojesusensis. The common name is deemed Nicaragua tree cricket.

Note the <> pattern on the back of the male.

Note the two large dark blotches on the female. Their position appears to match the two dark markings of the male.


Oecanthus ottei. The common name is deemed Otte's tree cricket.

Note the hint of an  X  on the male's wings.

Note the four dark blotches on the female.  Their position appears to match the four dark markings of the male.

Oecanthus belti.  The common name is deemed Belt's tree cricket.

The male has coloring similar to that of O. varicornis in the U.S., however, note the narrow wings.

The female looks very similar to O. varicornis in the U.S.


This is presumed to be O. allardi, a species previously known only to occur in the West Indies. These tree crickets found in Nicaragua have a song pulse rate, stridulatory file teeth count, and appearance that match those found in the West Indies.

[Note: Videos will not play with Microsoft Edge]

Below are waveforms of three species:  Snowy, Alexander's and the presumed to be a male O. allardi found in Nicaragua on hibiscus.  The top waveforms are a series of chirps; the bottom waveforms are the number of pulses in a single chirp.  One can see the differences in the number of pulses with each chirp for these three species.

The top waveform shows 15 seconds of chirping; the bottom shows a single burst/chirp



FOR COMPARISONS:

O. fultoni (Snowy tree cricket) waveforms  --   Top pair of waveforms show 10 seconds of chirping;  Bottom waveforms show 3 chirps.



 O. alexanderi (Alexander's tree cricket )  14 seconds of chirping then 1 burst/chirp



Although not a new species, this male is the first O. leptogrammus recorded while singing. 
[Note: May not play with Microsoft Edge]



This Oecanthus leptogrammus female was found on vegetation under a huge Guasimos tree.


Note the whitish background and black marking on the antennal segment.


Another view of the whitish background and black mark on the 1st antennal segment.  Note the very thin black mark - hence the common name of Thin-lined tree cricket.