churring

v.

颤鸣( churr的现在分词 )；

Vocalization attributes of specific song notes and distress calls (churring) between urban and rural great tits, Parus Major
Breeding Nightjar Survey – 2013 – Humberhead Peatlands NNR, SAC, SSSi, SPA
The Phylogeny and Ontogeny of Behavior
The Organization of Major Vocalizations in the Paridae
The status and distribution of Nightjars Caprimulgus europaeus in Britain in 1992. A report to the British Trust for Ornithology
Life Style of Coccyzus pumilus, a Tropical Cuckoo
Recognition of individual European Nightjars Caprimulgus europaeus from their song
Nightjars in Britain and Ireland in 1981
Nightjar Caprimulgus europaeus and Woodlark Lullula arborea– recovering species in Britain?
Animals and the Moral Community:Mental Life, Moral Status, and Kinship