Neptune long-lived atmospheric features in 2013-2015 from small (28-cm) to large (10-m) telescopes

•We demonstrate capabilities of amateur astronomers to observe and track large cloud systems in Neptune's atmosphere presenting data from 2013 to 2015.•Two bright discrete features Neptune's South mid-latitudes in 2014 seem to have collided into a single bright feature observed over 2015.•A bright large feature at planetographic latitude −40° in 2015 was linked to a dark spot observed in Hubble Space Telescope images.•We present zonal wind results from a long-term tracking of several cloud systems in 2013–2015.