84 INDIAN PIGEONS AND DOVES 
whether or not it is found during the winter months in the adjacent 
valleys and lower hills. 
Hume, in “ Lahore to Yarkand,’”’ drew attention to the fact that vast 
multitudes “ of this species were found during the summer in a zone of 
hills ranging from twenty to one hundred miles in width, and stretching, 
at any rate, from the borders of Afghanistan to the banks of the Ganges 
at Hardwar,” but, that during the winter they disappeared altogether. 
Hume suggests that these birds migrate to Assam, Cachar, Tipperah, and 
Burma, but I feel sure that there are no grounds for this belief, for twenty- 
five years’ residence in these parts have shown that there is no influx of 
birds into them during the cold weather. In Nepal there is nothing to show 
whether it ever moves up and down the mountains at the advent and 
departure of the hot weather, and in the Assam ranges I have been unable 
to ascertain that there is any movement of this nature. In North Cachar 
it was common up to about 6,000 ft. throughout the year, and equally 
so at all heights down to about 2,000 ft., below which it was somewhat 
less common though still plentiful right down to the level of the plains. 
In the Avicultural Magazine for March, 1912, Mr. P. T. L. Dodsworth 
refers to local migration in the following notes on the habits of this 
Green Pigeon: ‘The Kokla, or Wedge-tailed Green Pigeon is a common 
summer visitant to the North-west Himalayas, south of the first snowy 
ranges, arriving from Nepal and farther eastwards about the last week 
in April, or the beginning of May, to breed, and then returning to their 
old haunts about September, or as autumn sets in. During their summer 
sojourn in these mountains they are generally to be found along the outer 
ranges, at elevations of 4,000 to 7,000 ft., but are most common about 
5,000 ft. They principally affect well wooded and shady dales, hill-sides, 
valleys, and glens, and are not so gregarious as the Green Pigeons men- 
tioned by Mr. Dewar, which are to be found in large flocks, sometimes 
numbering as many as thirty to forty individuals, and even more. Our 
birds are to be seen either singly or in pairs, or in small parties of three or 
four. They are strictly arboreal, and are exclusively frugivorous. They 
are very partial to the ripe berries of the Kaiphul (Myrica sapuida). 
When hunting for fruit, they are continually gliding about the branches, 
like squirrels ; and, from their strong feet, they can hang over to seize 
a fruit, and recover their position at once by the strong muscles of their 
legs. When perfectly quiet they are very difficult to observe from the 
similarity of their tints to that of leaves. They are heavy feeders, and 
