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Table 5 The number of studies conducted for each study purpose

From: Effects of artificial light on bird movement and distribution: a systematic map

Purpose of study Number of studies
Document and/or reduce bird aggregations or mortality 169
Deter birds 88
Document birds foraging under artificial light at night 47
Test ability to orient under artificial light conditions 40
Study effects of artificial light on bird distribution or habitat selection 40
Capture or count birds for wildlife research 38
Improve welfare or production of captive birds 36
Monitor or describe bird migration 35
Basic behavioural research 7
Study effects of artificial light on bird community 4
Document occurrence of a rare species 3
Study weight loss during nocturnal migration 2
Document unusual bird behaviours 2