This Blackcap near to Guildford, Surrey was energetically singing and calling with the two often mixed together. Singing from deep within a Blackthorn thicket, this was one of my first migrants of the spring. The top recording is a sequence of song while the spectrogram shows three 'tack' calls followed by a burst of song.
This Coal Tit near to Guildford, Surreywas singing emphatically from a stand of pine and came to investigate me as I wandered by. The top sonogram is a song sequence while the bottom is a burst of seven calls showing the broadband 'pit' element of the note and the near constant frequency of the 'chu' element.
This is the song of a Goldcrest near to Guildford, Surrey. The top recording is a full song sequence while the lower sonogram shows a single song sequence followed by a single call. A lot of energy goes into this seemingly simple song.
This is a Great Spotted Woodpecker drumming on a dead oak snag at the edge of its territory in an oak woodland near to Guildford, Surrey with a Blue Tit singing in the background.
This Chiffchaff near to Dorchester in Dorset was avidly defending its territory against other Chiffchaff in the area. The top recording is a long song sequence while the image below shows the structure of the notes used in the song - the 'chiff' being higher frequency with a maximum intensity at around 4.6Khz while the 'chaff' is lower at around 3.9Khz.
This male Yellowhammer near to Dorchester, Dorset was perched in a hedgerow giving an undulating call sequence rather than its classic 'little-bit-of-bread-and-no-cheese' song.