Sometime in August 2011, one of the Spotted Doves (Streptopelia chinensis) that comes to my garden to feed on birdseeds, found its way right into the house. These doves usually enter the house whenever they need to be fed LINK. In this instance the feeder was empty.
The bird walked right to the other end of the house, where it looked helplessly through the windowpane. It did not move away when I approached. Gently I caught hold of it, holding it firmly with both hands and avoiding handling the tail. I am aware that it will shed its tail feathers if they are handled LINK.
Bringing the bird to the front door, I inadvertently removed my right hand prior to releasing it. At that split moment it struggled and in the process shed numerous semiplumes. This startled me somewhat and I immediately released it. It flew off amidst an explosion of feathers.
Obviously a prey will be taken by surprise when a dove or a pigeon reacts by shedding its many semiplumes in the ensuing struggle when caught.
Semiplumes are feathers whose bulbuls lack hooks and thus their barbs do not cling together forming vanes. These feathers provide insulation and help to maintain the streamlined form of the overlying feathers.
An earlier post LINK talks about fright moult of pigeons – semiplumes that are shed to frighten predators.
I didn’t know about this fright moult – quite interesting to experience it for yourself!
Tou Jing Yi
I had experienced it with an Abbott’s Babbler, it keeps on struggling the feathers off when I tried to grip hold of it, after a while it calms and stop struggling the feathers off and safely released.
Another Chestnut-winged Cuckoo also attempt to struggle off leaving many feathers fell to the ground as it attempt to do so, it too recover from its broken wing and flew off.
However usually the more typical garden birds that had been handled before would give less of a fright moult than these shier species.
Bird Ecology Study Group Mating of a pair of Collared Kingfishers
[…] [Birds 'trapped' inside homes should be carefully guided towards the door or window. Should it be cornered and unable to fly away, place both hands firmly on the body and bring it outside. Do not loosen your hold on the bird gradually but release it all at once. And do not catch hold of its tail feathers as certain species may indulge in fight moult, losing its feathers to gain freedom – see HERE and HERE.] […]
Bird Ecology Study Group Nesting behaviour of the Spotted Dove
[…] frighten off the predator and in the process its breast semi-plume feathers were shed – see HERE. The Changeable Lizard was lurking around possibly because of the presence of flies around the dead […]