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Data is being studied and analyzed by Nancy Collins. Laurel Symes will conduct DNA analaysis. There are three males singing on this page - 2 varicornis group males and 1 rileyi group male. One varicornis group male makes one short trill; the other makes a continous trill. The rileyi group male makes slow chirps If you have any data, photos or recordings of these species that were found in Nicaragua in January 2010, please contact me at: oecanthinae@gmail.com To be determined species from Nicaragua: The current feeling is that these varicornis group specimens are Oecanthus marcosensis (described by Charles Fuller Baker in 1905) - but then later deemed a synonym in 1932. An investigation is underway to possibly raise it back to full species status. Varicornis group males sing at night on low vegetation.
(PLACEHOLDER -- Constant trilling)
Domitila Reserve in Nicaragua - a varicornis group male.
Note the orange on the head and joints -- and pale antennae.
Frontal view of the base of the antennae.
This recording is of short bursts often heard in early evening. Only after dark did the song become more continuous (although trilling was never as long-lasting as species in the nigricornis group.) This young nymph was found within 2 feet of the above adult male. The pattern on the top surface of the abdomen matches varicornis.
Below is a rileyi group species. This male was found 3 feet above ground singing from a well-exposed hibiscus-type shrub alongside a well-traveled path at a resort complex. Note the golden head.
Here is a close-up view of the antennal markings: Black ovals on white backgrounds on the 1st and 2d segments.
(Relatively slow chirping - especially considering the temperature was 75 - 80 degrees) Below are waveforms of three species: Snowy, Alexander's and the male 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. Nica.sp.h The top waveform shows 15 seconds of chirping; the bottom shows a single burst/chirp
FOR COMPARISONS: O. fultoni (Snowy tree cricket) waveforms -- Top 10 seconds of chirping; Bottom 3 chirps
O. alexanderi (Alexander's tree cricket ) 14 seconds of chirping then 1 burst/chirp
This niveus group female was found under a huge Guasimos tree -- she is possibly Oecanthus leptogrammus.
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.
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This waveform is from a recording made of the male in the above photos while singing at night. The temperature was estimated to be 72 - 80 degrees F or (23 - 27 C). The pulse rate on this waveform is 80 pulses per second. 
Nica.sp.f
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 3 right-sided limbs and her ovipositor.
Nica.sp.h
This rileyi group male was found at Domitila Private Wildlife Reserve.
