A variation on: where can I find the pigeons? I will be in Santa Cruz one day on a transatlantic cruise, about 8AM-5PM, with a hire car, Apr 11. I welcome suggestions on a best strategy. Top targets are pigeons and chaffinch, but all endemics are welcome. (Its pretty tough to find bird-finding guides for Canaries in U.S. and its just one day, so suggestions like see pp44-45 of xxx don't help me much)
If arriving at Sta Cruz port the nearest pigeon area is the Anaga, an area of prisitine laurel forest on the eastern end of the island. A few hours spent around here, particularly where you have views across a wide sweep of canopy, should yield both pigeons. You are unlikley to get more than fleeting glimpses however! Pico del Ingles has great views across the canopy but can be busy with tourists - best bet is to go straight there as soon as you can. These woodlands will also give you goldcrest, common chaffinch, blue tit, blackbird, blackcap etc. From memory there are several pic-nic type spots in Anaga so you could try any of these if the crowds get too much.
As stated earlier, the easiest spot by far for Blue chaffinch is Las Lajas but this is at the opposite end of the island - a hefty drive but doable in the time you have. You could also try La Caldera on the nothern side of Teide - this site has both Chaffinches together, the only spot to do so.
At Las Lajas, just look around the picnic benches and taps - you will se groups of BC easily alongside Canary, Great Spotted woodpecker, Blue tit and Rock dove.
Other endemics should be picked up on route - Plain swifts will be evident as will Berthelot's pipit and Canary.
If driving from Anaga to Las Lajas, best route is probably round the motorway on the south and then up via Vilaflor. You could then continue up past Teide through the high-altitude scenery and then back round to Sta Cruz. If you have time, La Laguna has both Canary and Serin.
If you have more time, the agricultural fields surrounding Los Rodeos airport are excellent for a range of species - Sardinian warbler, Quail, hirundines, finches and raptors - always the chance of migrants in April.