Generally, seasons are well co-ordinated between tree buds, caterpillar’s food and birds hunting. However, a recent study conducted by Burgess and colleagues in Nature Ecology and Evolution, state that due to changed weather such as early spring may make imbalance between trees-caterpillers-birds and this may lead to deprivation of feed for birds especial at the time when they are feeding on caterpillar to nurture their off-springs.
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