Economy Insect-eating bird population drops in heavily extracted Himalayan oak forests Updated : August 20, 2019 05:07 PM IST Rural biomass extraction in the Himalayan forests dominated by oak in the state of Uttarakhand simplifies the forest structure by opening up the canopy and making the understorey less dense. This, in turn, negatively affects the species richness and abundance of insect-eating birds and oak specialist species. To reduce extractive activities, researchers suggest expanding protected areas, providing alternatives to forest timber and eco-tourism. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.