Assessment of correlation between European roller breeding and large insects

Background

The European roller was a breeding bird in Sweden until the 1970s. The reason for the species’ disappearance is not entirely clear, but its population is declining in several parts of Europe. One suggested cause of the decline is the lack of large insects, the species’ main food source. Another is a lack of nesting sites, and the installation of nesting boxes has proven to be a successful measure for the European roller in several locations.

Project description

Point surveys of large insects at a number (three) of European roller’s breeding sites in continental Europe (e.g., Spain, France, Hungary). The results are then compared with the number of insects at former European roller nesting sites in Sweden (e.g., Kalmar, Fårö, Gotska Sandön). If the insect abundance is comparable or overlaps, nest boxes could be a simple measure to promote the reestablishment of the species in Sweden.

Purpose

The purpose is to assess the number and species composition of large insects at current and former nesting sites of the European roller. The objective is to gain a better understanding of the causes of the European roller’s disappearance and ongoing decline, and to propose appropriate restoration measures.

Specifications

A degree in biology or a related natural science field. A solid knowledge of insects is required, as well as a driver’s license. Language skills in addition to Swedish or English—such as Hungarian, Polish, or Spanish—may be considered an asset.