This month’s cover portraits an adult male Black‐headed Paradise Flycatcher Terpsiphone rufiventer nigriceps caught with an elevated mist‐net frame (EMF) in a tropical rainforest of south‐west Ghana. The bird was caught during a study to test the efficacy of a new EMF‐system (bottom left corner of the image) developed by Lars H. Holbech to safely and efficiently trap birds in upper‐strata vegetation zones. Capturing this specimen above a narrow forest road was aided by portable speaker playback of its song. This species is often referred to as a species of the ‘understory’ (0‐5m height), but was caught here in ‘upper mid‐story’ (at 15m), emphasising how important elevated mist‐netting is for precise description of avian vertical preferences. This EMF represents a replicable, versatile and manoeuvrable design for catching birds in forest strata >25m above the ground, without need for tree climbing or excessive clearing of vertical net‐lanes in lightly‐cluttered vegetation.

中文翻译：

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封面图片和发行信息

本月的封面肖像是成年男性黑头天堂捕蝇器Terpsiphone rufiventer nigriceps被高架的雾网框捕获（EMF）在加纳西南部的热带雨林中。在一项研究中捕获了这只鸟，以测试由拉斯·霍尔贝克（Lars H. Holbech）开发的一种新的EMF系统（图像的左下角）的功效，该系统可以安全有效地将鸟捕获在上层植被区中。便携式扬声器播放其歌曲有助于在狭窄的林间小道上方捕获该标本。该物种通常被称为“林下”（高度为0-5m）的物种，但在“中上层”（15m）处被捕获，强调了雾化高架对于精确描述鸟类的重要性。垂直偏好。该EMF代表了一种可复制，通用和可操纵的设计，用于在地面以上> 25m的森林中捕捞鸟类，而无需爬树或在杂乱无章的植被中过度清理垂直网状通道。