174 YORKSHIRE NATURALISTS’ UNION AT MALHAM. 
was noticed, and on the moor-top the Weasel and Stoat were added 
to the list. e way was then taken for Malham Tarn, and in 
passing through the wood flocks of Goldcrests, in company with 
Coal and Blue Tits, were observed. Mr. Morrison having kindly 
placed his boats at the disposal of the Union, the party, in company 
with the Conchological section, were soon afloat. A flock of about 
thirty Mallard rose from the water, and after circling about for some 
little time settled on the further side of the Tarn. Here the only winter 
visitor was noted —a female Wigeon, which paddled quietly away. 
This is a somewhat early occurrence, as the bird does not usually 
arrive on our shores until the end of September. On reaching the 
lower end of the Tarn the Mallard were again disturbed, and shortly 
afterwards a couple of Little Grebes, which were seen swimming, 
dived on the approach of, the boat. After disembarking, the party 
followed the stream to the ‘Sinks’ and made their way to Malham 
Cove, where other Weasels were observed, and after descending, the 
stream was again followed to Malham, several Kingfishers being seen 
en route. It would appear that the waters from the Tarn become — 
cooled in their passage through the earth, for Mr. Knubley took the 
temperature of the waters with the following result :—Gordale 
Beck 57°, Aire 46°5°, the temperature of the atmosphere in both 
cases being about 68°. The following is a complete list of the 
Vertebrates observed on the excursion :— 
Mammals. 
Weasel. Rabbit. 
Stoat. Water Vole. 
Birds. 
Missel Thrush. Greenfinch. 
Song Thrush Sparrow. 
Blackbird. Chaffinch. 
Ring Ouzel. Yellow Bunting. 
Redbreast Starli 
Goldcrest. Jackdaw. 
Hedge Accentor. Carrion Crow. 
Dipper. Rook. 
Coal Tit. Kingfisher. 
Blue Tit. Kestrel. 
Wren. Mallard. 
Pied Wagtail. Wigeon. 
Grey Wagtail. Ring Dove. 
Meadow Pipit. Red Grouse. 
Swallow. Lapwing. 
artin. nipe. 
oe ae aoe: Little Grebe. 
Goldfinch. 
Fish, 
Trout. Bullhead (Cottus gobio), 
Naturalist, 
