The Wonders of Instinct: Chapters in the Psychology of InsectsFabre, Jean-Henri
Science
The Wonders of Instinct: Chapters in the Psychology of Insects
Fabre, Jean-Henri
Insects; Instinct
Very soon two Necrophori have discovered the tit-bit. They climb up the
miniature mast; they explore the body, dividing its fur by thrusts of
the head. It is recognized to be an excellent find. So to work. Here we
have again, but under far more difficult conditions, the tactics
employed when it was necessary to displace the unfavourably situated
body: the two collaborators slip between the Mouse and the stake, when,
taking a grip of the latter and exerting a leverage with their backs,
they jerk and shake the body, which oscillates, twirls about, swings
away from the stake and relapses. All the morning is passed in vain
attempts, interrupted by explorations on the animal's body.
In the afternoon the cause of the check is at last recognized; not very
clearly, for in the first place the two obstinate riflers of the
gallows attack the hind-legs of the Mouse, a little below the ligature.
They strip them bare, flay them and cut away the flesh about the heel.
They have reached the bone, when one of them finds the raphia beneath
his mandibles. This, to him, is a familiar thing, representing the
gramineous fibre so frequent in the case of burial in grass-covered
soil. Tenaciously the shears gnaw at the bond; the vegetable fetter is
severed and the Mouse falls, to be buried a little later.
If it were isolated, this severance of the suspending tie would be a
magnificent performance; but considered in connection with the sum of
the Beetle's customary labours it loses all far-reaching significance.
Before attacking the ligature, which was not concealed in any way, the
insect exerted itself for a whole morning in shaking the body, its
usual method. Finally, finding the cord, it severed it, as it would
have severed a ligament of couch-grass encountered underground.
Under the conditions devised for the Beetle, the use of the shears is
the indispensable complement of the use of the shovel; and the modicum
of discernment at his disposal is enough to inform him when the blades
of his shears will be useful. He cuts what embarrasses him with no more
exercise of reason than he displays when placing the corpse
underground. So little does he grasp the connection between cause and
effect that he strives to break the bone of the leg before gnawing at
the bast which is knotted close beside him. The difficult task is
attacked before the extremely simple.
Difficult, yes, but not impossible, provided that the Mouse be young. I
begin again with a ligature of iron wire, on which the shears of the
insect can obtain no purchase, and a tender Mouselet, half the size of
an adult. This time a tibia is gnawed through, cut in two by the
Beetle's mandibles near the spring of the heel. The detached member
leaves plenty of space for the other, which readily slips from the
metallic band; and the little body falls to the ground.
Public-domain text, read in full here on John Shaqi.
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