Shotgun Microphones Vs. Parabola

Here a test at the limit of a reasonable sound pickup distance (about 40 meters) regarding a type of Robin call, the so-called repeated Tic call, to test the real difference between a sound pickup performed with a parabolic microphone versus two types of shotgun microphone (a short shotgun and a long shotgun).
As a parabolic microphone I used a 57 cm diameter Telinga, with a type of microphone called Twin Science inside: a Cardioid capsule facing inwards of the parabolic dish more an Omnidirectional capsule facing outwards of the parabolic dish.
The shotgun microphones used were the Sennheiser ME66 and MKH816t, both quite old but still considered quality instruments.
A Sound Devices 744t recorder was used in conjunction with a Sound Devices 302 mixer for the two additional external tracks.

A clear demonstration that a shotgun microphone doesn’t amplify but isolates (although not completely) the target subject of the recording, while a parabolic microphone not only focuses on the target subject, but also amplifies it significantly. By equalizing the levels, the noise introduced with shotgun microphones is such that a long-distance recording is practically unusable for quality recording purposes, unlike the parabolic microphone.
I think it is not difficult to draw a conclusion in favor of the parabola when recording subjects at a distance.

The audio file shows the four tracks both as recorded (*) and normalized up to -3dB (**), all alternated track by track.