Sleep on the Wing

The mostly instrumental songs were recorded at Bibio's countryside home in the midlands of England, with only two tracks featuring lyrics.[2] The music includes field recordings of nature sounds such as birds and running water.[4] All instruments were performed by Bibio himself, including acoustic guitar, violin, cello, bass guitar, tape loop, and turntable.[1]

The EP was announced on 5 May 2020 along with the release of the title track.[1] The same day, a music video directed by Sonnye Lim premiered on YouTube, featuring animated elements from the artwork for the release.[5] The EP was released on Warp Records on 12 June. According to Bibio, the release is a companion piece to the 2019 album Ribbons and shouldn't be considered a full album.[6] On 15 June, Bibio released a music video for "Oakmoss" that featured the artist playing a fully acoustic version of the song.[7] Throughout July and August 2020, videos for the songs "Otter Shadows",[8] "Crocus",[9] "A Couple Swim",[10] and "Awpockes"[11] that featured rural landscapes were released on Bibio's YouTube channel.

Professional ratings

Aggregate scores
Source	Rating
Metacritic	70/100[3]
Review scores
Source	Rating
AllMusic	[12]
Exclaim!	7/10[13]
PopMatters	7/10[14]
Uncut	6/10[15]

Sleep on the Wing received an average of 70/100 based on five reviews on the aggregator Metacritic, indicating generally favourable reviews.[3] AllMusic named it one of the best releases of 2020, calling it "quintessentially Bibio," and "just as winning" as the 2019 album Ribbons, writing that "spending more time with it is a joy."[12] Exclaim! magazine commented that "the sound is never gritty or raucous, by any means, but the almost jarring collision of genre remains hopeful without getting comfortable."[16] In a mostly positive review, PopMatters said that "it’s a pretty good record, and the songs will linger with you after you’ve stopped spinning the record – it’s just that Wilkinson is capable of so much more."[17]