Long lens, guessing 400-500 mm.
Short exposure time to minimize the chance of shake. Rule of thumb is max exposure time = lens mm. eg., no slower than 1/400 for a 400 mm lens.
Could be much faster here with the bright sun.
Probably a large aperture to get enough light for the fast exposure.
Large aperture plus fast exposure = shallow depth of field = bokeh, the background blurring.
Could be a 45 or 60 MP sensor for the details even when cropped.
Could be on a mono- or tripod.
Exif is easy enough to delete in PS or LR when exporting to jpg.
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