My new-found companion, Morton and I, continued into Reserva Ecológica Costanera Sur. We had walked 2km along the promenade in Buenos Aires to reach the main gate and Visitors’ Centre (Google Earth ref; 34°36'59.71"S 58°21'18.78"W), noting 37 birds along the way. I want to treat the inside and outside of the park separately, so the post for our approach along the promenade can be seen below, or here. We took a very quick look at the Visitors’ Centre, noting a Saffron Finch as we did so, then turned left and headed northwest(-ish) on a path that ran parallel to the promenade.
The path was lined with the Tipuana Tipu tree that had also lined the promenade and are so common throughout the city. Morton spotted a Bran-coloured Flycatcher and while he was trying to point it out to me, a Small-billed Elainia too. Continuing on a theme he found a Streaked Flycatcher on the other side of the path.