20 photographers or twenty birders in general? Downsview Park is very large and could easily distribute 20 birders to scarcity but I imagine that all twenty people were concentrated into the small woodlot looking for owls. Who can expect otherwise, I suppose, when owls are so difficult to find. Still, even if I could venture out, but I assuredly cannot, the magnetic field created by so many birders at one site would deter me completely. Birding by committee is not my cup of tea and I would unreservedly forego a shot of an owl to avoid crowds. Hiking, fishing, birding, photography are all endeavours that put you at 'one' with your environment and three's a crowd. I'm pleased that you got some photos of the LEO and in time your persistence will reward you with a SEO too.
