Thought about the use of a tape recorder is not new, zoologists have long ago used it for studying of animals and contact with them, photo-hunting with the tape recorder intelligently and with the details is described in the book
Luscinia
Many birds are noted for their skill to intertwine the fragments of the songs of other birds with their song. Thus, the close neighbors of luscinia ( marshy and garden [kamyshevka] ) it occurs this trill they will give out, that you involuntarily search for by eyes next to them another bird. But even among the mockers luscinia is separated: it is considered that all sounds in its song are borrowed in different birds. Yes even ordered singer himself with the amazing turn blue by small pile and by white star rivets view, and it seems that it carried this bird randomly into our temperate latitudes.
It is necessary to acknowledge that with the mirror in this form of photo-hunting it is connected most of all problems. The size of its 30[Kh]40 cm, is sufficiently inconvenient for the walking on the forest or on the field, but even it occurs insufficiently so that the bird would see in it itself. The contrivances now and then you will not only devise: and you will fasten to the tree, and the branches -[prisad] before it you will establish, and you will nearer place dynamic loudspeaker. And here bird arrives flying to the song, sings all around dynamics, but in
Nightingale
After sounding of song from dynamics, the nightingale, as a rule, begins to speed up the rate of its creation, changes the pattern (it mixes elbow) and it listens to the rival. The first nightingale, the owner of the section, where was established my tent, flew up to the tape recorder and to summer cut into the mirror. It rapidly arrived into itself, but, remembering lesson, it no longer flew close, but it sang by 5-6 meters higher dynamics. Through the pair of the hours of futile expectations it was necessary to replace shelter. This was the first year, when in the forest-protection strip, between the summer-resort sections and the road, did not sing old, experimental male. Among the young was separated one, with the small elbow, which it copied from the song of [drozdovidnoy] [kamyshevki]. The latter in this locality never were conducted, nightingale could hear them only in the overflight. This male was selected as the object for further observation.
After establishing dynamic loudspeaker on the tree, I included the existing record
[Korostel]
Tent was established under the trees on the edge of forest and hardly it was covered by branches. [Korostel] skeptically related to its masking - it went around shelter three times, from time to time screaming out its
Conclusion
Birds a similar form of surveys will traumatize less than photographing in nest. But it is better to distract them only to the small time intervals from the more vital matters. Indeed to males, it is possibly necessary to build nest or to feed the female, that hatches eggs, to protect territory from the real neighbors (but not from the photographer) or to feed nestlings. In nature the skirmishes between the males are frequent moreover, but they are short, whereas for obtaining the qualitative photo the hours of contact with the object of survey are required. Reaction to the overdose of contact with the rival can be different. For example, one nettle undergrowth after the hour of intensive singing is hollow into the torpor for 5 minutes. |
